Question 24. H_2S and HS^- (K _al for H_2S is 8.9 x 10^-8) HCO^-_3 and C0^2- _3

Question

Question 24. H_2S and HS^- (K _al for H_2S is 8.9 x 10^-8) HCO^-_3 and C0^2- _3 (K_a2 for H_2CO_3 is 4.8 x 10^-11) HC_2O^- _4-and ( K_a2 for H_2C_2O_4 is 5.1 x 10^-5) Consider these five salts dissolved in water. Which aqueous solution will have an acidic pH? RbCN LiNO_3 NaBr NH_4CI.K_2CO_3 Which of these salts will have the largest molar solubility in water? AgcI (K_sp = 1.8 x 10_-10) Pbs (K _sp = 2.5 x 10^-27) SrCO_3 (K_sp = 9.3 x 10_-10) PbCrO_4 (K _sp = 1.8 x 10^-14) BaSO_4 (K _sp = 1.1 x 10^-10)

Explanation / Answer

Salt which is formed by the combining strong base and strong acid will give the nuetral pH

Salt which fromed by the combibibg strong base and week acid will be Basic pH

sat which is formed by combining the week base and strong acid will be the Acidic pH

your answer is D

lets see how it is

NH4Cl will formed by

NH3 + HCl ---------> NH4Cl

week base strong acid Salt

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