Question & Answer: The effect of a catalyst an on equilibrium is to _____ A) increase the rate of the forward…..

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The effect of a catalyst an on equilibrium is to _____ A) increase the rate of the forward reaction only B) increase the equilibrium constant so that products are favored C) slow the reverse reaction only D) increase the rate at which equilibrium is achieved without changing the composition of the equilibrium mixture E) shift the equilibrium to the right Which one of the following is the weakest acid? A) HF (K_a = 6.8 times 10^-4) B) HClO = (K_a = 3.0 times 10^-8) C) HNO_2 (K_a = 4.5 times 10^-4) D) HCN (K_a = 4.9 times 10^-10) E) HC_2H_3O_2 (K_a = 1.8 times 10^-5) Of the following substances, an aqueous solution of _____ will form basic solutions. NH_4Cl Cu(NO_3)_2 K_2CO_3 NaF A) NH_4Cl, Cu(NO_3)_2 B) K_2CO_3, NH_4Cl C) NaF, K_2CO_3 E) NH_4Cl only A solution containing which one of the following pairs of substances will be a buffer solution? A) Nal, HI B) KBr, HBr C) RbCl, HCl D) CsF, HF E) none of these