Thursday
April 24, 2014

Posts by Petty


Total # Posts: 7

CHEMISTRY LAB urgent assistance
1 (A) This relation gives the dissociation constant of acetic acid (CH3COOH) Ka = [H3O+][CH3COO-]\[CH3COOH] Starting from this relationship show that pH = pKa + log [base]\[acid] urgently need assistance

Chemistry help pliz
continued from above calculate the initial pH of the acetic acid-sodium acetate solution above.The pKa of acetic acid is 4.76

Chemistry help pliz
Explain (using equations) how a solution of 1.0 mol dm^-3 in both CH3COOH and CH3COONa is resistant to changes n pH when we add either small amounts of acid or small amount of base (such solution is called a buffer)

Chemistry
hey can anyone tell me whats the formula of PHTHALIC ACID? which one is it: (a) H2T (b) C8H6O4

Chemistry [sumone help me please :(]
0.250g of phthalic acid is dissolved in 40.00cm^3 of 0.100 mol dm^-3 NaOH. It requires 11.80 cubic centimeters of 0.100 mol\dm^-3 HCL fo neutralisation( to phenolphthalein) The mole ratio in which phthalic acid reacts with sodium hydroxide ihn 1:2 (a) Calculate the moles of ex...

Chemistry urgent for my LAB today (22.09.11)
hey thanx heaps for your help much appreciated :) CHEERS

Chemistry urgent for my LAB today (22.09.11)
0.250g of phthalic acid is dissolved in 40.00cm^3 of 0.100 mol dm^-3 NaOH. It requires 11.80 cubic centimeters of 0.100 mol\dm^-3 HCL fo neutralisation( to phenolphthalein) The mole ratio in which phthalic acid reacts with sodium hydroxide ihn 1:2 (a) Calculate the moles of ex...

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