Acid Definition and 698 Threads

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...

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!

Background: Extraction lab using diethyl ether as solvent. Mixed an unknown mixture of benzophenone and salicyclic acid. Try to separate the 2.2 Questions: 1 In separation of ether sol'n from NaOH layer, some of the sol'n was left behind in the ether solution, how would that change the...

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...