Acid Definition and 683 Threads

Citric Acid Cycle --matching carbons Which glucose carbons are pyruvate carbons from? I've been trying to get this for hours. please help.. Also how do you trace carbons along the ciric acid cycle?

I solved an assignment problem and I came to the conclusion that the % ionization of a strong acid decreases as the initial concentration of the ionized acid is increased. I don't fully understand why this is..? Any clarification would be greatly appreciated! Thanks in advance!

Homework Statement 800ml sample of 2.00 molar formic acid HCOOH (or HA) ismixed with 200ml of a 4.80 molar NaOH. Calculate the [H3O+] of the resulting solution. Homework Equations (for buffers) pH=pKa-log(HA/A-) Ka for formic acid is 1.8x10-4 pH=14-pOH [H+]=(1.00x10-14)/([OH-) The...

I am taking R-Alpha Lipoic Acid (RALA) as a supplement, however apparently it's very unstable and polymerizes at about 40-50 degrees C and becomes unabsorbable. Apparently it also polymerizes when it reaches the stomach. There are also stabilized forms such as Na-RALA and K-RALA. Now what i want...

Hi, can someone tell me what are the optimum settings for a charger to charge a 24v 12ah Lead Acid Battery? I know that the voltage stays the same. I just need to know what current will cause the faster charging and, at the same time, won't destroy the battery.

Homework Statement http://mediacache7.badongo.com/0884498173211799/798797/image/2008-11-19/org/artikkel.jpg?dl=y&ts=1227145896&z=e7d45b61d9dface538a93f9fe95c48ee&ip=84.48.203.55 2. The attempt at a solution Not I or V because here there's no increase in resonance stabilization.

Thank you in advance for the correction of the resolution. Homework Statement By reacting 225 g of hydrochloric acid with 300 g of calcium carbonate with 80% of purity, 34 L (litres) of gas were obtained, measured at 37oC and a pression of 0.82 atm. What is the yield of this reaction and what...

in identification of phenol with fecl3 if we add an acid (e.g:HCl) color of complex will disappear >why?

can hydrochloric acid seriously injure say your hand if it hit it? serious burns or down to the bone?

Homework Statement Calculate the pH of concentrated hydrochloric acid if this solution is 24.8 % HCl by weight and has a density of 1.16 g/mL. Homework Equations The Attempt at a Solution \the percentage is throwing me of, can someone explain what it is?

in literature, find melting point and solubility in water of benzoic acid, vanillin, phthalic acid, salicyclic acids. Calculate the expected volume of hot water that would be requried to dissolve 0.15g of each compound. With info on melting point and solubility in water... how can you...

I came across this interesting article to convert a standard lead acid battery into alkaline: http://blog.hasslberger.com/2007/01/how_to_convert_a_lead_acid_bat.html Seems very promising. Not only does the capacity increase slightly, but the battery also withstands deep discharges much...

Homework Statement How do i get the Ka of weak base indicators such as bromophenol blue, methly red, bromothymol blue, and phenolophalein? I found the pKa values online but i couldn't find their Ka values.

(purpose is to find molar mass) At the start we dissolved 0.945 grams of unknown weak acid into water and made it up to 100 ml Then we used 25 ml of that solution and titrated it until the end point. Now , this is a monoprotic acid so it's going to take 1 mol of acid to neutralise 1 mol of...

Homework Statement The phosphoric acid in a 100.00 mL sample of a cola drink was titrated with 0.1029 M NaOH. The first equivalence point was detected after 13.34 mL of base added, and the scond equivalence point after 28.24 mL. Calculate the concentration of H2PO4- in mol/L. (Hint: if only...

Me and some friends recently stumbled upon a 1M solution of Sulfuric Acid. It's in a small 30 ml bottle and has no distinct smell. After running a few amateur experiments (pouring it on stuff), we concluded that it is either extremely weak or simply water. I know from ap chemistry a few years...

If you add HCl to a buffer solution of HF/NaF, the F- will react with H+ to produce HF. THe new pH can be calculated with the henderson-hasselbach equation. My question is, if F- decreases and HF increases, why and how does [H+] change? HF <> F- + H+ Thank you.

Hello everybody, I have the following problem: I have a batch reactor were I have solid particles reacting with acid. The reactor is stirred. The solid particles are in the range 150-250 micron. I'd like to let them react for a short time, and then quickly remove the liquid face and dry up the...

Homework Statement I am trying to determine the products of the equation CH3CO2H(aq) + NH3 Homework Equations Acid Base reaction The Attempt at a Solution I know that this is an acid-base reaction so I assumed it would form a salt (acetate) and water but that doesn't account for...

Homework Statement I did an experiment where an extraction was done with an unknown carboxylic sample. Some mass of it was mixed with ether and aqueous NaOH then aqueous layer extracted, etc. The question asks though, why is the unknown compound soluble in aq. base not acid. Also, describe a...

can sodium sulphate, p-toluidine, and benzoic acid form hydrogen bond with water?

Hmm... I wonder why. http://www.yahoo.com/

Homework Statement I'm trying to determine whether the arrowed nitrogen is acidic or basic. Apparently the answer is that it is acidic. I don't really understand how I am suppose to make that call. That nitrogen is part of secondary amine that is basic, with resonance effect from the oxygen...

Glycolic Acid possible treatment for scar tissue? I'm looking into possible treatments for scarred tissue. One substance I have come across is Glycolic Acid. It is used extensively in cosmetic creams and skin peels in a <10% concentration and is used for deep tissue skin peels by...

I am confused with how these reaction occurs. I don't know the polarity of compunds like NaHCO3, Amyl acetate, Benzoic Acid, Phenol, and EthylamineOrganic Sample with 1M HC with 1M NaOH with NaHCO3 Amyl acetate insoluble insoluble X Cyclohexane...

Hi All I have a question that I require an answer to. For the above titration, concentration of A-(conjugate base of acid) is the same as concentration of HA at half equivalence. It is at this point that pka=ph of the solution. I agree to this conclusion, but why is the concentration of A-...

what is the pl of a molecule? What is the acid dissociation constant? Thanks in advance for any replies

Homework Statement chloroethanoic acid is added to an alkaline solution of phenol. Give the structural formula of the organic product formed and state what type of reaction takes place. it is from a past exam paper and i got no one to check my answer, which I'm a bit unsure of...

See attachment

CH3CH2CH2CH2OH A benzene ring with an OH group attached on the top and a NO2 group attached at the bottom. A benzene ring with an OH group attached on the top and a CH3 group attached at the bottom. A benzene ring with an OH group attached on the top And my question is, how...

So Kw = [H+][OH-] = 10^-14 is true all the time of water and aqueous solutions? When we add an acid, how does the OH- go down to maintain Kw? Is the OH- from the self-ionization of water helping to neutralize the addition of the acid? Thanks.

Mg reaction with Ethanoic acid... My Teacher told me that if we react any group 1 metals with Ethanoic acid, then it's "OH" will be replaced by metal. E.g Na + 2CH3CO2H------> CH3CO2Na + H2 But he said that if we react any metals from group 2 then reaction will happen like this...

[SOLVED] Water solubility of benzoic acid Homework Statement At 25^{0}C a saturated solution of benzoic acid with K_{a}=6.4 x 10^{-5} (can't get this thing to display a simple multiplication sign in the equation) has a pH = 2.80. Calculate the water solubility of benzoic acid in moles per...

the XRD pattern of Zinc oxide and zinc oxide in acrylic acid ! I did XRD analysis of zinc oxide, and its peaks are at 31.7, 34.4, 36.2, 47.5, 56.6, 62.9 and 67.9 (2-theta degree). further, I did XRD of zinc oxide dispersed in acrylic acid/IPA. but it's weird ! Why I could got some peaks at...

im trying to find a monoprotic acid with a molar mass of about 64 g/mol. is there a list of all acids somewhere on the internet? the closest I've found are nitric acid, boric acid and chlorous acid..

Homework Statement Two protons have different pKas: 3.50 and 4.25. The molecule is 2-bromo-3-nitrophthalic acid (if I'm naming it correctly). Assign the correct pKa to each proton. http://uploader.ws/upload/200805/pkablank.jpgHomework Equations A lower pKa means a stronger acid, which means...

Homework Statement Estimate the volume of acid rain in L that can be neutralized by 1.00 g of limestone. Assume the pH of rainwater collected in your rain gauge is a representative value for acid rain. Assume that acid rain contains sulfuric acid as the source of hydrogen ions. The molecular...

[SOLVED] BioChem Amino acid Homework Statement A protein has a MW of 26,000 Daltons. The protein consist of 7 alpha helix segments that cross a cell membrane of 4.5 nm. Homework Equations What they want to know is the minimum number of AA's for a single segment to cross the membrane...

"By taking a little apple cider vinegar before a meal, you can increase stomach acidity and thereby improve digestion and nutrient uptake. " But since vinegar is less acidic than stomach acid wouldn't it follow that vinegar would reduce stomach pH? (unless the watery contents of vinegar flux...

Procedure: 1. Pipette 25 cm3 of ethanoic acid into a conical flask 2. Titrate against 0.1M sodium hydroxide solution in the burrette, using phenolphthalein as indicator. 3. Pipette further 25 cm3 of ethanoic acid into the solution after titration and mix throughly. Questions: 1. what is...

I currently have a set up where I have attached a permanant magnet dc motor to a bicycle. The motor is attached through a diode to a 12v regulator and then to a 12v to 240v inverter. Everything works fine and I can power up my devices. But I have been told that if I connect my 12V lead acid...

OK, so I just got out of an organic chemistry exam. I feel pretty good about every question except one which I did not know - please help me put my mind at ease! What is the major product of the reaction of this molecule: http://img216.imageshack.us/my.php?image=stupidthingdw3.jpg with...

Homework Statement Titrating .1006M CH3COOH with .2012M NaOH. pKa=4.74, Ka=1.8*10^-5 What is the pH at the equivalence point of the titration? Homework Equations pKa = -log(Ka) pH = -log[H+] The Attempt at a Solution Alright, after setting up an ICE table (in order to find...

the acid solution in a fully charge lead storage cell contains 33% h2so4 by weight and has a density of 1.25g/ml. cALculate its molarity

I'm having some trouble understanding what happens when Zinc and Hydrochloric acid are reacted with Copper Sulfate as a catalyst. I *think* the Copper ion gets electrons from the zinc and turns into straight copper which leaves zinc free to react with the chlorine to form zinc chloride. Does...

Why is the enthalpy of neutralisation of a strong acid mixed with a strong base always the same, no matter what acid and base combination you use, provided they are 'strong' acids and bases? Am I right to say that this value is accepted as -57.35 kJmol-1? Thanks for any help, Isaac.

hi i have the following reaction isobutyric acid + 2-methoxyethanol <-> 2-methoxyethyl-2-methylpropanoate but i don't know all of the by-products. please help thanks edit: i think is only water and some unreacted reactants?

Homework Statement If Lovastatin were heated in dilute aqueous acid, what would the molecular weight of the product be? (The large of the two products. Assume that there is no hydration of the alkene functionalities.) Homework Equations N/A The Attempt at a Solution I drew...

How can I calculate the amount of citric acid to add to a solution of a given pH, to achieve another value of pH?

Homework Statement Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane: 2C17H35COOH --> (C17H35COOH)2 H°rxn = -172 kJ The equilibrium constant for this reaction at 28°C is 2900. Estimate the equilibrium constant at 38°C. 1) 4.7 *10^5 2) 1.9 * 10^3...