Acid Definition and 683 Threads

Alluminium + Nitric Acid = Alluminiumnitrate Whats the chemical formula for this equation ? :) Thanks

Homework Statement A buffer is prepared by dissolving 1.00 mole HLac (with a ka=8.0x10-3) and 1.00 mole of sodium lactate (NaLac) in enough water to form one (1) liter of solution. Calculate the [H+] and the pH of the buffer. 36 minutes ago - 3 days left to answer. Additional Details 12...

[SOLVED] Titration Lab Homework Statement How many grams of pure citric acid in the juice solution when 4.00 g of the juice crystals are dissolved in 100.0 mL solution? The juice solution is titrated using a given solution of sodium hydroxide. The NaOH is titrated into 10 mL of the juice...

I have to examine the amino acid sequences of a segment of each of the following proteins: lysine, alanine, leucine, arginine, isoleucine, proline, glycine, histidine, and serine. Provide, in order, a list of the following potential components. a. tRNA nucleotides (in the anticodon loop) that...

[b]1. The dipole moment of a peptide bond is 3.7 Debye in water. Assuming that a hydrogen bond is essentially a dipole-dipole interaction, estimate the energy of a hydrogen bond between two peptides in water and in the interior of a protein (neglect the competing interactions with the solvent)...

Would a lack of vitimin b12 and folic acid make some one very tired?

Homework Statement How does sulphuric acid catalyze the preperation of ester? The Attempt at a Solution Does it cleave the molecule that becomes the ester?

Homework Statement We did a lab in class about weak acid/strong base titration, but I'm having a bit of trouble. We we only given the molarities of an unknown weak acid and a strong base (NaOH) and the pH of six different mixtures containing different mL of the two, which is below: Test...

Can a solution of 35% sulfuric acid and 65% water be safely stored in a plastic bottle? That is, does sulfuric acid of this concentration react with any or all plastics? if plastic is not acceptable, what type of storing container could safely contain the acid? If interested, what I have in...

Homework Statement A beaker with 135 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.1 M. A student adds 7.80 mL of a 0.400 M solution to the beaker. How much will the pH change? The pKa of acetic acid...

A beaker with 135 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.1 M. A student adds 7.80 mL of a 0.400 M solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.76. What I did...

Hi I have been trying several days to solve this problem. But i can't find the procedure to solve this weak acid and weak base problem. I will really appreciate some help. What is the pH of a soft drink in which the major buffer ingredients are 6.90 g of NaH2PO4 and 5.70 g of Na2HPO4 per...

Hi I have been trying several days to solve this problem. But i can't find the procedure to solve this weak acid and weak base problem. I will really appreciate some help. What is the pH of a soft drink in which the major buffer ingredients are 6.90 g of NaH2PO4 and 5.70 g of Na2HPO4 per...

Homework Statement A solution is to be buffer at pH = 3:35 with formic acid and formate. (a) How many moles of formic acid and sodium formate are needed if the solution is to change pH by < 0:02 for the addition of 0.02 moles of strong acid? i need help how to set up a problem like...

[SOLVED] magnesium and acid rates reactions im producing an investigation in the reaction between magnesium a solid metal, and acids of varying concentration, pH and temperatures. these variables are to produce results for comparison. however i am unsure about what apparatus would be most...

Homework Statement A 0.307g sample of an unknown triprotic acid is titrated to its equivilence point using 35.2ml of 0.106 M NaOH. Calculate the molar mass of the acid. Answer is in g/mole. Homework Equations The Attempt at a Solution I just don't know where to start with this...

25 mL of 0.1 M HOAc are titrated with 0.15 M NaOH. What is the pH at equivalence? I know that the pH at start will be greater than 1.0 and the pH at equivalence will be greater than 7 since its a titration of a weak acid and a strong base. But what I don't know is whether or not there is a...

Hey Guys, I seem to be having some problem with this question. Can anybody help me out? Each of the following salts can be prepared from an acid and a base. Write the balanced molecular equation and net ionic equation for the preparation for each. Indicate states of the reactants and the...

Hi. In class, i am required to perform a titration where i am given a solution of sodium carbonate and a solution of hydrochloric acid of known concentration. I am to use the acid to calculate the percentage purity of the sodium carbonate. Im not really sure how to go about doing this. The...

If I have a mixture of benzoic acid and benzil, and I add dichloromethane to it and extract it using sodium hydroxide, the benzoic acid reacts with the sodium hydroxide to form sodium benzoate, but what does the benzil react with. I know that its in the organic layer because it's neutral but...

Hello, I did a lab on the recrystallization of benzoic acid. My solvent was hot water and used charcoal to adsorb any color impurities. I am trying to figure out how I should write a reaction and a mechanism for this. Is there even a reaction and mechanism I can write for this? Any...

Why is oxalic acid called ethane-dioic acid even if it has nothing else but 2 carboxylic group??

Homework Statement Do not understand the question. 2. My Lab Results Topic : Volumetric analysis - Acid base purpose : To determine the exact concentration of a mineral acid, HXO4, and to determine the relative atomic mass of the element X. Materials : KA1 is a mineral acid, HXO4...

Homework Statement I'm just checking over the equation/reaction for butyraldehyde's solubility in H2SO4. Homework Equations See below. The Attempt at a Solution Will it be CH3CH2CH2C(=O)H + H2SO4 --> HSO4- + _________(+) __________O-H -----------|| CH3CH2CH2C-H ? Thanks.

I have a bottle of 100% pure citric acid. I would like to know how to make a 15% solution of citric acid from this.

Hello everybody, I'm having difficulty understanding the rationalization behind the strengths of Bronstend Lowry acids and bases and my textbook isn't too helpful. Can someone please expalin to me: (1) What exactly is effective negative charge density? (2) how does electronegativiy correspond to...

Homework Statement I just wanted to review what happens when methyl benzoate dissolves in sulfuric acid (the ionic species that arise). My workings/reasonings are below. Homework Equations See below. The Attempt at a Solution After the ester in placed in the acid, the...

Can somebody tell me the color the following items turn when purple Cabbage Indicator is added: Water Hydrogen peroxide Isopropyl alcohol Saline solution Aspirin Pepto-Bismol Alka-Seltzer Tonic water Vinegar and can you tell me if the items listed above are Acid or Base or Neutral...

A couple of questions: 1) How do I minimize it? 2) Would 5-6 small meals per day be a better digestive option? 3) Would a vegetarian diet cure acid reflux?

i'v synthesized benzoic acid from benzyl alcohol and i have a theoretical value for the yield and and experimental yield of impure acid. Theoretical Yield = 5.93g Impure Yield from experiment = 6.13g Now, my paper asks for the percentage yield of my impure acid, how does that work? If...

An experiment was carried out in class. Basically, Baking Soda was added to different concentrations of Ethanoic Acid. The plot of 'Maximum Foam observed' vs. 'concentration of the Acid'. The curve went up but then dropped noticeably! :confused: So basically, with high concentrations or low...

I did an experiment in one of the labs and I have a question I need to figure out. The experiment was the porduction of p-acetylaminotoluene, from p-toluidine. My question is we used acetic acid and acetic anhydride, but which is the acetyalting species. I thought of looking at the...

Why does oxidizing nature of nitric acid gets reduced on dilution?

Hello people...could u help me pls...coz i am rly stuck in these thing like calculations...i know all right answers but i am not too sure how to get them...please if somebody of us has a few minutes could u help me with that? Thank you very much. 1., When 0.25 g of sodium metal was added...

Chemistry questions Q1: Calculate the amount of 6M HCl that would be required to neutralize and acidify (to ~pH2) the reaction mixture of 1g Benzaldehyde and 2mL 10M KOH. I think this is the chemical equation: Benzaldehyde + KOH + H+ -> Benzyl Alcohol + Benzoic Acid Q2: 64% yield of 1,1...

[Chemistry Lab] Cannnizzaro Reaction Hi! I am having some questions about my chemistry lab. In the lab we are given 1 of the 5 unknown aldehyde (benzaldehyde, anisaldehyde, nitrobenzaldehyde, chlorobenzaldehyde, and dimethoxybenzaldehyde) and reacts it with methanol and KOH to undergo...

Sorry, I'm not much of a biology expert, but I was looking into the interactions between b5 and omega 3 fatty acids. I wanted some help clarifying this. http://www.pdrhealth.com/drug_info/nmdrugprofiles/nutsupdrugs/pan_0196.shtml Does that imply that it breaks down fatty acids and uses them as...

I wonder if someone can help me here. For part of my geography dissertation I'm hoping to completely dissolve some very pure limestone (~99% CaCO3) to get some microfossils out. I'll be using either acetic, monochloric or formic acid (probably dilute) because as far as I'm aware these are the...

I have figured this out

Question: Calculate the change in pH of a 0.400 M C6H5COOH solution when 100.0 ml of a 2.50 M KOH solution is added to 1.000 L of C6H5COOH. For C6H5COOH, Ka = 6.46 X 10^-5. Work Done So Far: We're to determine the change in pH, thus we'll need to find the original pH. Ka = 6.46 X...

If one would make no assumtions to try to simplify, except for just assuming OH- were negligible in a solution of weak diprotic acid, H2A, we can create four equations to represent concentrations for : H2A == H + HA- HA- == H + A- Each of those has a K value for equilibrium constant...

Hello, i would really appreciate it if someone could help me with this problem. I would like to know the pH of citric acid at various concentrations. 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%. From what i have read it has something to do with its pKa value which for citric acid is...

Hi. Can oxalic acid be used as a primary standard to standardise a basic solution, such as sodium hydroxide? I can't think of any reason why it couldn't be used, but i could very much be missing something.

Nitric acid equation! Homework Statement we're doing reaction predictions and were given nitric acid to balance. Homework Equations Nitric acid yields nitrate+water NO3 --> NO2 + H2O but I've been up to a 36 for a constant and still can't get it..PLEASE HELP!:bugeye: The...

Homework Statement Given H2SO4 + 2LiOH --> Li2SO4 + 2H2O, how many mL of a 0.700-M solution of KOH are needed to react with 235 mL of a 0.350-M H2SO4 solution? The Attempt at a Solution Really, I have none. My problem is that I don't understand what the question is asking. I could...

Hi everybody I know that concentrated sulfuric acid doesn't react gold. But I am puzzled because the oxidation potential of sulfure in concentrated H2SO4 is even higher than that of gold. Could anyone help me please. Thanks

Question: TRIS is a weak base. Compute pH of a solution containing .050 moles of TRIS and .020 moles of HCl in a total volume of 2L. pKb for TRIS is 5.92. Use RNH2 to represent TRIS. Equation: pH = pKa+ log ([conjugate base]/[acid]) Work: change equation for pOH: pH = 14-pOH pOH =...

Homework Statement I'm making a table on excel with the calculated pH of the solution vs the actual measured pH from the lab. My problem is finding the pH of a acetic acid-acetate buffer that has been titrated with HCl, once the moles of HCl are greater than the initial quantity of mols of...

Homework Statement Sketch curve of pH vs volume of base added for the titration of 50.0ml of 1.00M acetic acid with 1.00M sodium hydroxide. Homework Equations none, i think. The Attempt at a Solution Okay, first off, this is a weak acid, the first point on the curve would be the initial...

Homework Statement You dissolve an unknown quantity of weak acid HA into 50 mL of water. It only takes 1 mL of 5 M NaOH to completely neutralize the acid. The Ka of the acid is 3.2 x10^-4. What is the pH at the endpoint?Homework Equations Ka * Kb = Kw pH + pOH = 14 p(of whatever) = -log(of...