Acid Definition and 683 Threads

Homework Statement If you started at the basic end-point and titrated acetate solution to the acid end point, how much acid would be required? Our acetate solution was: 1 mL of 0.1 M acetic acid 1 mL of 0.1 M acetate 8 mL of water total volume: 10 mL Titration with 0.1 M HCl...

i was recently reading about uv absorbance, and i understand why species such as the phenoxide ion and aniline absorb uv radiation at longer radiation and with more efficiency than their protonated counterparts. i have spent long hours, however, trying to figure out why a benzoate ion might...

Homework Statement after titrating sodium hydroxide with hydrofluoric acid, a chemist determined that the reaction had formed an aqueous solution of 0.020 mol/l sodium fluoride. determine ph of the solution Homework Equations The Attempt at a Solution Ka of HF= 6.3X10^-4 NaOH +...

Is Arcylic Acid a Reducing Acid Or an Oxidising Acid ? Or does it exhibit dual character ? Secondly, Butyl Arcylate only exhibits reducing properties - right ?

In my Chemical engineering Course, I have an Engineering Materials assignment, which needs to be submitted by this Monday. It contains questions based on the mechanical design of a binary distillation column that separates acrylic acid from butyl acrylate. I'm required to select a...

Homework Statement What functional groups are present based on the compound's names? A. Methyl Hydroxybenzoate B. 2-Hydroxypropanoic acidHomework Equations The Attempt at a Solution We've learned about the basic Hydrocarbon derivatives in class, but only dealing with problems like...

Can anyone tell me what a 1% (mass or volume) sulfuric acid solution is in moles? I want to find out the pH of a 1% (mass or volume) sulfuric acid solution?

Homework Statement A 0.149 g sample of a weak acid (HA) requires 16.80 mL of 0.110 M NaOH to completely reach the equivalence point. What is the Molar Mass of the acid? Homework Equations ... The Attempt at a Solution i don't think i did it right. i just did 0.0168Lx0.110M=...

Hi guys, I've got a question which i couldn't solve. Both napthalene (two benzene ring join together) and benzoic acid are aromatic compounds which exist as white solids. Based on their physical ahd chemical properties, describe how you could separate the components of a mixture of these...

How are the cells (say 2V) of a typical lead acid battery connected in series to increase voltage to 12V when all the neg. plates are connected together and all the positive plates are connected together which as I understand is the principle of connecting two batteries in parallel (pos...

Homework Statement Consider a titration in which 50.00 mL of .450 M benzoic acid, C6H5COOH, is reacted with 0.2000 M Ca(OH)2. What will the pH be when 60.00 mL of Ca(OH)2 has been added?Homework Equations 2C6H5COOH + Ca(OH)2 -> 2 H2O + Ca(C6H5COO)2The Attempt at a Solution I have determined...

I am uncertain if alcohol react with acid ( not carboxylic acid ) will produce salt or ester.

Can anyone help me with this homework question? it was like this: The reaction between the acid and aluminium is slow in the beginning and then gets faster. Give an explanation for this observation. Thanks.

Do they perform double replacement to form an insoluble precipitate? Will this reaction take place? How would I know?

Hi guys, i am wondering when amino acid (let's take glycine as an example) reacts with acyl chloride say ethyl chloride. Would it react with both the -COOH group and -NH2 group or would it be considered as an acid and reacts only with the -NH2 group?

Homework Statement "Soda lime is 85.0% NaOH and 15.0% CaO. What volume of 0.500M Hydrochloric Acid is required to completely neutralise 2.50g of the Soda Lime?" Hint: Consider the reactions separately Homework Equations Formation of Soda Lime: CO2 + H2O >> H2CO3 H2CO3 + 2NaOH >>...

How to prepare a 100mg/ml solution of glacial acetic acid in methanol? The density of glacial acetic acid is 1.05 g/cm^3.

"The rather strong acidity of trichloroacetic acid is usually ascribed to the inductive effect of the three chlorine atoms attached to the end of the molecle opposite the acidic proton. Electron density is withdrawn away from the carboxylate group so that the trichloroacetate anion that is...

I know how to get the answer for this question using hesselback equation but I don't understand the question. I have some questions about the questiuon. 1. The PKa value of the sulphydryl (-SH) group of cysteine is 8.33. Calculate the fraction of anion to free sulfhydryl group at PH 7.O...

Hi ! i am new to these forums.. so i just want to ask whether i am posting my query in the correct forum?? I have a doubt regarding this weak acid - weak base buffer. When the moles of Acid > Base, We use the formula pH = pka + log10 ([salt]/[acid]) to calculate the pH of the Acidic Buffer...

Hi, I am looking for more information on vapour pressures of propanal and propanoic acid at room tempreature and need to explain in in terms of molecular structure. Couldn't find any thing on it though.

Here's something I've been wondering about for some time. How long does it take a cell to produce a string of amino acids? More spesific: The duration between the DNa beginning to make the RNA string and the string of amino acids being delivered?

If I have x moles of magnesium and y moles of a monoprotic strong acid (I'm talking about something like 0.03 moles or less of each reactant with the magnesium being the limiting reactant) the there's going to be a noticable pH change right? Because I remember my teacher showing us the...

I've looked at a few websites and some say it is slightly soluble,some say it is insoluble in water and others say it is soluble only in hot water. I'm not sure which one is true. Hope someone can help. Thank you.

I've been trying to figure this one out for a while. A 0.1276g sample of a monoprotic acid was dissolved in 25mL H2O, and titrated with a .0633 M NaOH solution. Volume required to reach equivalence point was 18.4 mL. It asked me to calculate the molar mass, which i found to be 116g/mol: 0.0633...

how do I make 1000ml of 0.1M Nitric acid with 65% Nitric acide (specific gravity 1.42g) and Molecular weight 63g/mol

Homework Statement How can I calculate the enthalpy of solution for sulfuric acid at 30°C/68°F, for 0,2;0,5;1 mol/kg? Homework Equations The Attempt at a Solution I tried using a enthalpy-concentration diagram, but I cannot read it. I would apreciate if anyone could help me!

Will carbon powder dissolve (ionize) in sulfamic acid? If so, what ionic state?

1. Homework Statement How many peaks will there be in the NMR spectrum of Malic Acid, HOOC CH2 CH(OH) COOH, WITHOUT D2O as the solvent (i.e. Hydrogens in Hydroxyl groups WILL have corresponding peaks)? 3. The Attempt at a Solution I thought the two -COOH groups will be identical...

Homework Statement How many peaks will there be in the NMR spectrum of Malic Acid, HOOC CH2 CH(OH) COOH, WITHOUT D2O as the solvent (i.e. Hydrogens in Hydroxyl groups WILL have corresponding peaks)? The Attempt at a Solution I thought the two -COOH groups will be identical Hydrogen...

Hi there, I have some trouble understanding redox reactions. Here is the question: Sulphuric acid is one of the strongest inorganic acides which in some reaction shows oxidation properties. In which of reactions below, sulphuric acid acts as oxidating tool? A. \text{H}_2{SO}_4 +...

Homework Statement hey guys, I've got a prob, i kinda know how to do this question but i can't get past the first step. i want to write an equilbrium expression by I am not sure what the chemical reaction is. any help would be good Homework Equations A solution of a weak acid, HCOOH...

Homework Statement The active ingredient in aspirin is acetylsalicylic acid. A 2.51 g sample of acetysalicylic acid required 27.36 mL of a 0.5106 M NaOH for complete reaction. Addition of 13.68 mL of 0.5106 M HCl to the flask containing the aspirin and sodium hydroxide produced a mixture with...

Homework Statement Calculate the pH after 24 mL of 1.00 M NaOH is added from the burette to a beaker containing 25.0 mL of 1.00 M HCl Homework Equations pH = -log [H+] 1*10^-14 = [H+][OH-] The Attempt at a Solution combined volume = 49mL n.unreacted(H+) = 0.025-0.024 = 0.001...

I was told to design an experiment and run it during my chemistry lab period, and I came up with the following idea: Soil usually is limed with calcium carbonate containing products (agricultural lime) in order to raise the pH of the solution. Thus, I first isolated the amount of calcium from...

Homework Statement hey guys, i got a problem. "concentated nitric acid is 70.7% HNO3 (molar mass=63g) and 29.3% H20 by mass. the density of the solution is 1.42gcm. what is the molarity. Homework Equations i know i should rearrange the formula d=m/v but i can't work out the mass becuase...

Homework Statement Write two equations that illustrate that an aqeous solution of NaHCO3 can act either as an acid or a base. In pure water show quantitatively which of the two reactions predominate. ka1= 4.2x10-7, Ka2=4.8x10-11 The Attempt at a Solution as an acid: NaHCO3(aq) +...

I'm having some difficulty memorizing the strong acids for some reason. Does anybody have any tips or tricks to aid in memorization? Perhaps a mneumonic device? Or am I going to have to brute-force memorize?

Homework Statement What is the difference between alpha-keto acid and keto acid? The Attempt at a Solution I know that the difference is that alpha-keto acid contains an alpha carbon. However, I do not know what the alpha carbon is in this case, and how I can show it.

I need help with this problem I'm trying to solve. It's attached. I just don't know where to begin, what to do, and how to approach it. Please help me out Thanks in advance

How do I calculate the [H+] fo a 0.05 M lactic acid solution. The Ka of the lactic acid is 1.39 X 10-4 is this a henderson - hasselbalch equation?

I got this idea that I could maybe replace the heavy lead acid battery on my motorcycle with a lithium ion polymer battery. I found that you can buy batteries for RC cars that match the power requirements. The lead acid battery is 12 volts, 6Ah. It seams that L.I.P. batteries for RC cars are...

Homework Statement In the reaction between salicylic acid and acetic anhydride, if you use a water bath at 90°C instead of 50°C. The final product (acetylsalicylic acid) was tested for the presence of phenols with ferric chloride. This test was negative (no color observed); however, the...

Basically I want to know which bondings are broken when going from the solid phase to the liquid phase. I know that benzoic acid makes dimers (though only in gas phase, some say?) and that they have Van der Waals' forces between their rings. I tried to use my knowledge about water: Water have...

Homework Statement How can you determine if an acid is strong or weak given the titration curve? I need two reasons. Homework Equations The Attempt at a Solution 1 Reason that it is weak is that its being titrated by a strong base and the equivalence point is above pH of 7...

Hi there, This may seem like weird question, but for my pre-lab this week I need to add along with intro and flow chart a table of reagents. now my only two reagents that I will be using is 2 g of crude Benzoic acid (including impurities) and water. in my table though, they ask for the #...

hi , i am newbie here and reading through i find it ... stimulating.. now as to what brought me here.. i have wanted to look into art form of acid etching different knids of tempered steel used in stainless knife blades.. does anyone there know what mask coating will take a fine line...

*urgent* Finding unknown acid concentration Homework Statement Construct an experimental procedure in in order to determine the unknown concentration of an acid. Be sure to describe the standardization process. Homework Equations The Attempt at a Solution I think a viable...

hi there.. is there anyone know how to synthesis an Acetylsalicylic Acid from Acetic Anhydride and Salicylic Acid . i just know how 1 step.. but then my proff told me there's suppose to be like 5 or six step to obtain it. i'll appreciate your response.

At what point in either beta-oxidation or citric acid cycle is ATP used? I see where ATP is produced in citric acid cycle (originally as GTP) as when succinyl CoA is converted to Succinate, but I can't find any part where ATP is required. Apparently according to my lecture notes, it is...