What is Titration: Definition and 278 Discussions

Titration (also known as titrimetry and volumetric analysis) is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte (a substance to be analyzed). A reagent, termed the titrant or titrator, is prepared as a standard solution of known concentration and volume. The titrant reacts with a solution of analyte (which may also be termed the titrand) to determine the analyte's concentration. The volume of titrant that reacted with the analyte is termed the titration volume.

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  1. K

    QLD - Year 12 Chemistry Unit 3 and 4, IA2 student experiment suggestions please

    Heyy I just started year 12 this year, and my school has already started our IA2 student experiment, I was wondering which experiment would be the best choice for me to do and would help me to achieve a 20/20. 1. Titration experiment 2. Galvanic cell experiment could you also provide a list of...
  2. M

    Normality of (COONa)2 - KMNO4 titration (redox reaction)

    We used 14ml of a KMNO4 solution of 0.01 Normality, to find the Normality of a (COONa)2 solution. If we took 10ml of the (COONa)2 solution, what should its Normality be? I thought about using the following equation: N1V1=N2V2 Does the stoichiometry of the redox reaction affect the equation...
  3. haha0p1

    Chemistry Finding indicator for acid-base titration

    This question is asking about finding the indicator. I think phenolphthalein will be used as there is a reaction between strong acid and strong base. Is this approach to the question correct? Or am I missing any important concept? Kindly tell
  4. kofffie

    Chemistry Help with Complex Acid-Base Titration

    Help! I am confused with my assignment. it was about complex acid base titration. the analyte was citric acid and the titrant was a base. To find it, I need to search for C1V1=C2V2, however during the balanced equation, there is 3 mol of my base that will be reacting to 1 acid. Will the ratio of...
  5. I

    Chemistry Titration of HCl with CaCO3, then excess HCl titrated with NaOH

    There is 0.019243 mol of CaCO3, and therefore 0.038485 mol of HCL. There is 0011505 mol of HCl in excess after reacting it with CaCO3. The concentration of HCl after water is added is 0.11515 mol/dm3. There is 0.0011515 mol of HCl in 10 cm3 of the new solution, and the same number of moles of...
  6. il postino

    Chemistry Calculate the potential at the equivalence point

    Data ##E^{0}_{I_2/I-}= 536mV## ##E^{0}_{Cr_2O_7^{2-}/Cr^{3+}}= 1330mV## ##I_{2} + 2e- \Leftrightarrow 2I^{-}## ##Cr_2O_7^{2-} + 14H^+ + 6e^- \Leftrightarrow 2Cr^{3+} + 7H_2O## Total Reaction ##6I^{-} + Cr_2O_7^{2-} + 14H^+ \Leftrightarrow 3I_{2} + 2Cr^{3+} + 7H_2O##...
  7. Justinboln

    Chemistry Calculating Concentration of Acid using a pH Titration Curve

    Use the equivalence volume from the pH curve to calculate the concentration of the acid, HA. I'm not sure which equation to use or how to approach this question (Attached). Please elaborate on the steps on how to answer the question. Thank you!
  8. Prabs3257

    Chemistry Is the N Factor of Oxalic Acid in Titration Correctly Applied?

    I got a answer by equation the moles i took the n factor of oxalic acid as 2 and the naoh solution came out to be 2M but i got an answer of 4grams but the answer given is 2 grams am i correct ??
  9. C

    Iodine Adsorption and Titration with Na2S2O3

    1/ iodine stock solution: mixed 2,5424 g I2 and 24,1525 g KI and made up to 100 ml with water 2/ 150 mg active carbon is mixed with 12,5 ml jodine solution from point 1 / 3/ At equilibrium were performed filtration and titration with 10 ml of the filtrate with a volumetric solution Na2S2O3...
  10. M

    Chemistry Lab Titration curve calculations

    Homework Statement Homework EquationsThe Attempt at a Solution I don’t have a clue on how to do the calculations. I know the equivalency point is at the steepest part of the derivative graph. Please don’t say just figure it out, I truly need help. I haven’t learned titrations in lecture yet...
  11. D

    Chemistry How do you calculate moles to neutralise oxalic acid?

    Homework Statement calculate the number of moles of potassium manganate required to neutralise oxalic acid. 2KMn)4- + 5H2C2O42-+ 16H+ --> 2Mn2+ + 10CO2 + H2O Homework Equations n = c x V n= m/Ar The Attempt at a Solution Moles of oxalic acid = 5x10-4 Volumeol of KMnO4 = 0.01085dm-3...
  12. K

    Investigating the Stoichiometry of Reactions 1 & 2

    Cl2(g) + 2I–(aq) -->I2(aq) + 2Cl–(aq) (reaction 1) [2S2O3^(2-)(aq) + I2(aq) --> S4O6(2-)(aq) + 2I–(aq) (reaction 2) Why isn't n(I2)(reaction 2)=2n(S2O3^(2-))(reaction 2). I don't see why this is wrong. <edit: remove size and italics>
  13. Krushnaraj Pandya

    What Volume of NaOH is Required for Back Titration in Simple Back Titration?

    Homework Statement 20 ml of decinormal HCl soln. is added to 10 ml decinormal AgNO3 soln. AgCl is precipitated out and excess of acid was back titrated against a decinormal NaOH soln., What volume of NaOH was required for the back titration? 2. The attempt at a solution 10 ml HCl reacts with...
  14. M

    Chemistry Why moles of (S2O3 2-) is equal to mol of ( MnO4-) times 5

    Homework Statement The ratio of KMnO4 to I2 is given by 2 MnO4 - + 16 H+ + 10 I - ⇌ 2 Mn2+ + 5 I2 + 8 H2O the ratio is 2:5 - The ratio of I2 to S2O3 2- is given by 1 I2 + 2 S2O32- ⇌ 2 I-+ S4O5 2- the ratio is 1:2 therefore n(S2O3 2- ) = n(MnO4 - ) x 5 Homework Equations Why the mole of...
  15. Krushnaraj Pandya

    Double titration and law of equivalence

    Homework Statement 1) for a given reaction to consume one reactant completely, must the equivalents of both reactants be same? for example, I know in the reaction of HCl + NaOH - the equivalents of HCl=equivalents of NaOH for a titration, is it the same for Na2CO3 + HCl? 2) the following is an...
  16. Z

    Titration Troubles: Where Did We Go Wrong?

    Homework Statement We had a titration lab where we took 1.0 g of NaOH and added it to 50 mL of water. We then took that solution and added 10 mL of it to 500 mL of water, producing a 510 mL solution in total (this became the titrant). We then took 0.4 g of potassium hydrogen phthalate and...
  17. Grant

    Determination of an Acid (Monoprotic) by Titration Lab

    I tried looking for my unknown (209.70 g/mol) online and couldn't find it. The closest I found were H4O7V2(217.907 g/mol) and HCl2I(198.819 g/mol), but I know I am correct to a 2.7% accuracy. What other lists can I use to solve this?
  18. M

    MHB Titration Question: I'm Confused!

    I am confused on a titration question. I understand most of it but I do not see why they do not multiply their answer by 10 at the end because it says 100 cm^3 of water was analysed but that formula gives answers in moles/L so to make it into a liter they should multiply by 10 but they do not ?
  19. T

    What is the percentage of Fool's Gold in the original sample?

    Homework Statement Joshua has been gold panning and extracts a mixture of silicate stone and shiny gold-like particles. However Nkosi says these are Fool's Gold i.e Chalcopyrities (Cu Fe S2). They decide to find out how much iron is in the sample by: -Grinding a 30.00g sample to a fine powder...
  20. N

    At what temperature does citric acid decay?

    I am currently performing a school experiment in which I am testing when citric acid decays. We are juicing lemons, filtering them to get a higher concentration of citric acid, placing them in water baths from 10 to 90 degrees Celsius and then titrating them against one mole of sodium hydroxide...
  21. M

    MHB How Does Dilute Sulfuric Acid Affect the Titration of Ammonium Iron(II) Sulfate?

    A solution of (NH4)2SO4·FeSO4·6H2O (hydrated ammonium iron(II) sulfate), used as a primary standard, was prepared by dissolving 8.82 g of the crystals in dilute sulfuric acid and making the solution up to exactly 250 cm3 with deionised water. This standard solution was titrated in 25.0 cm3...
  22. A

    Acetylsalicylic Acid Titration Lab: Calculating Mass and Moles of Aspirin

    Really struggling with this! Here is the data: Concentration of NaOH: .104M Mass of Aspirin #1: .367g Mass of Aspirin #2: .365g Volume of NaOH mixed with Tablet 1: 50ml Volume of NaOH mixed with Tablet 2: 50 ml Trial 1 Mass of Na2CO3: .065g Initial volume of HCl: 18.80mL Final Volume...
  23. X

    Titration of acetic acid w/ NaOH problem

    1) Given: 0.100 M NaOH, 5 mL concentrated acetic acid. 30 mL of distilled water was added to dilute the concentrated acetic acid. Calculated: Equivalence point (Vol = 32.5 mL, pH = 9.3) 1/2 equivalence = 32.5 mL/2 = 16.25, pH = 4.4 1. Calculate the concentration (M) of the diluted acetic...
  24. Wrichik Basu

    Solving Copper (II) Salt Titration Problem

    Homework Statement :[/B] The percentage of copper in a Copper (II) salt can be determined by using a thiosulphate titration. 0.305g of a copper (II) salt was dissolved in water and added to an excess of KI solution liberating Iodine. The liberated Iodine required 24.5 ##dm^3## of a 0.1 mole...
  25. Wrichik Basu

    A question in double titration

    Homework Statement :[/B] A mixed solution of KOH and sodium carbonate required 15ml of (N/20) HCl solution when titrated with phenolphthalein indicator. But the same amount of solution, when titrated with methyl orange as an indicator, required 25ml of the same HCl. The amount of KOH in the...
  26. Wrichik Basu

    A problem in Redox Titrations (Kjeldhal's Method)

    Homework Statement :[/B] 1.08g of ##NH_4 Cl## is boiled with 62ml ##\frac {N}{2}## ##NaOH## to expel ##NH_3## completely. 44ml of ##\frac {N}{4}## ##HCl## is required to neutralise the excess alkali. Calculate the percentage of ##NH_3 ## in ##NH_4 Cl##. Answer given: 31.5% Homework Equations...
  27. Wrichik Basu

    What is the difference between valence factor and n-factor?

    What is the difference between valence factor and n-factor for oxidants and reductants? Take ##H_2O_2## as an example. What is the difference between the n-factor and valence factor for this compound? Also, how do I find the n-factor for any oxidant or reductant?
  28. I

    Titration Exam Question 1: Calculating Concentration of Undiluted Nitric Acid

    1. The problem statement, "all variables and given/known data A solution of nitric acid, HNO3, of concentration 100 g dm-3, can be used to artificially age wood. A sample of nitric acid was tested by pipetting 10.00 cm3 of the acid into a 250 cm3 volumetric flask and filled up with deionised...
  29. B

    Preparation of murexide indicator for Ca measurement

    I want to prepare murexide indicator for Ca measurement using EDTA titrimetric method. I am following the procedure set by the American Public Health Association (APHA), however, I only have murexide diluted with K2SO4 (1:250). I want to know if I can use this as a substitute, and if yes, how...
  30. C

    How Do You Calculate NaCH3COO Concentration and Predict pH at Equivalence Point?

    Homework Statement a) Determine the concentration of NaCH3COO. The volume of HCl used to reach the equivalence point is 25.05 mL, the concentration of HCl is 0.10 M, and the volume of NaCH3COO solution used is 10.0 mL. b) Using the initial concentrations of NaCH3COO and HCl, and a reliable...
  31. T

    Understanding the chemistry behind: Why O2 and not I2?

    We were doing O2 estimation by Winkler's method The procedure and reactions involved in this experiment are: Carefully fill a 300-mL glass stoppered bottle brim-full with sample water. Immediately add 2mL of manganese sulfate to the collection bottle. Add 2 mL of alkali-iodide reagent (NaOH +...
  32. B

    Magnesium salt of EDTA is the same as EDTA-2NaMg?

    I was reading through the standard complexiometric method of determining hardness in water, and the procedure mentioned the use of the magnesium salt of EDTA. I looked up online to purchase this reagent but all I could find was disodium magnesium salt of EDTA. Are they one and the same? Thanks!
  33. M

    My vitamin C titration with iodate turned red. Help

    So for my IA, I dissolved a 1000mg vitamin c tablet in 355mL of water, took 20mL of it and diluted it to 100mL making it about 0.0032mol/L. I then added 5mL of 0.5mol/L potassium iodide, 5mL of 1.0mol/L hydrochloric acid and some 6 drops of 1 gram of starch dissolved in 100mL of water. I then...
  34. T

    How Does Winkler's Method Calculate Dissolved Oxygen in Water?

    We were measuring the amount of O2 dissolved in water by Winkler's method. Here's a link to the procedure and reactions: http://file:///C:/Users/SANJUKTA/Desktop/Downloads/Capture.PNG http://dropcanvas.com/6su7m/1 (The same is attached to this post) We had to use this formula: c(O2)...
  35. P

    with "Triprotic Acid Titration" Question

    Hey guys! So I have this chemistry problem which I'm finding very difficult. QUESTION: You have an unknown triprotic acid, H3X, and have titrated it with 22.53mL of NaOH. The pH of the unknown solution is 2.04 and the concentration is 48.028g/2L. While the concentration of the NaOH is...
  36. Z

    Calculating the Ksp of Calcium hydroxide at room temp

    Homework Statement I conducted a titration experiment in which 0.1g of KHP was dissolved in 50mL of distilled water and placed in an Erlenmeyer flask. I filtered a Ca(OH)2 solution (that was left out open on the lab benches for us to use) and put that into the burette and titrated. Ultimately...
  37. ReidMerrill

    EDTA Titration of an antacid tablet

    In my analytical chemistry lab course my lab partner and I are trying to determine the percent calcium by mass of an antacid tablet by EDTA (mixed with 0.001M MgCl2) titration using an EBT inidcator. We have ran into a problem which is we've got poor results which we refuse to accept. Long story...
  38. circuit232

    Back Titration: Tips for Aceing Your Exam

    Hey guys! I have an exam tomorrow on back titration. Can i have some useful advice?
  39. K

    Finding acid dissociation rate constant from titration

    Homework Statement When a weak acid HA is titrated 75% of its endpoint, it has a pH of 5.25. Calculate its Ka. Homework Equations Ka = [H+ ][A- ]/[HA] [H+] = 10^-pH The Attempt at a Solution I found [H+ ] from the pH to be 10^-5.25 M. From the dissociation equation of HA, we know there is a...
  40. T

    Ethanoic acid and NaOH titration

    Homework Statement Homework EquationsThe Attempt at a Solution If 50% of the acid has been neutralised, then there is 0.05 M of acetic acid left.Using Ka $$ 1.8*10^-5 = \frac {x^2}{0.05-x} $$ I get x = 0.00094 -log(0.00094) =3.02687 =pH This is not one of the answers provided. I think I...
  41. R

    Titration of strong acid with weak base

    Homework Statement Homework Equations Henderson-Hasselbalch Equation The Attempt at a Solution Sorry for the huge picture, but the number says 0.007558 mol. Is my ICE table correct? Equation: 7.42 = 6.85 + log((0.007558-x)/x) (0.007558-x)/x = 3.715 x = 0.00160 mol H+/(0.07483 L + 0.01339 L)...
  42. W

    Determine percentage of iron(II) and iron(III) in a solution

    Hi I am stuck on the following question. Outline a plan of an experiment to determine the percentage of iron present as iron(III) in a solution containing Fe3+(aq) and Fe2+(aq) ions. You are provided with zinc, a standard solution of potassium dichromate(VI) and dilute sulphuric acid. Zinc can...
  43. Tony Stark

    Equivalence point in acid-base titration

    In acid base titration, we try to neutralize the analyte by adding sufficient titrant and observing the color change in the indicator. But if the analyte is neutralized, then it must always be at ph 7. Why is it that we use indicator of different ranges to check equivalence point?
  44. Titan97

    Volume strength of H2O2 using iodometric titration

    Homework Statement To a 25ml H2O2 solution, excess acidified solution of potassium iodide is added. The libereated iodine required 20ml of 0.3N sodium thiosulphate solution. Calculate the volume strength of H2O2. Homework Equations Normality = n-factor × Molarity Volume strength = Molarity ×...
  45. RoboNerd

    Titration error affecting the PH of the endpoint

    Homework Statement Hi everyone. 1) If I perform a titration with a buret not rinsed in the titrant, then how will the pH of the endpoint be affected? 2) Also, if the volumetric pipet used to measure the analyte is not rinsed with the analyte, how will that affect the pH of the endpoint...
  46. RoboNerd

    Question about acid and base indicators

    Homework Statement Methyl red has the following structure [not listed here on this post] Ka = 5.0 * 10 E -5 It undergoes a color change from red to yellow as a solution gets more basic. Calculate an approximate pH range for which the methyl red is useful. What is the color change and the...
  47. W

    Titration of KMnO4 and H2O2 under Acidic Conditions

    Homework Statement A redox titration is carried out by adding Purple KMnO4 solution from a burette to a solution of H2O2 in a flask. Which of the following would occur in the flask before the equivalence point is reached? The answer is: The solution is colorless and O2 is formed. The other...
  48. B

    Titration Questions Homework: Dry/Wet Flasks, Stoppering Flasks

    Homework Statement A sample of saturated Ca(OH)2 solution in water is collected in flask #1, filtered into flask #2, then 25.00mL samples were transferred into flasks #3, #4, #5. Which flasks had to be dry and which could be wet? Also, flask #2 was stoppered. Why? Homework EquationsThe...