Which salt will form a neutral aqueous solution? NaF Sr(C_2H_3O_2)_2 KBr NH_4Cl

Question

Which salt will form a neutral aqueous solution? NaF Sr(C_2H_3O_2)_2 KBr NH_4Cl What is the pH of an aqueous solution of equal volumes of 0.60 M nitrous acid, HNO_2 and 0.30 M sodium nitrite, NaNO_2 The K_a of HNO_2 is 4.46 Times 10^-4. 5.73 4.12 3.05 2.78 The pH of an aqueous 0.00796 M solution of HIO_3 is 2.12. What is the K_a of HIO_3? Do nor assume that ionization is negligible with respect to the initial concentration. 0.16 0.0076 0.00037 0.21 According to Lewis theory, a Lewis acid is a(n) proton donor. electron-pair donor. proton acceptor. electron-pair acceptor. Which acid is likely to result in the greatest percent ionization in aqueous solution? 1 M HC_2H_2BrO_2; K_a = 1.3 Times 10^-3 1 M HCHO_2; K_a = 1.8 Times 10^-4 1 M HIO; K_a = 3.2 Times 10^-11

Explanation / Answer

2.

Only KBr, since in solution, K+ and Br- will remain in solution

3.

this is a buffer so

pH = pKa + log(A-/HA)

pKa = -log(Ka) = -log(4.46*10^-4) = 3.350

pH = pKa + log(A-/HA) = 3.350 + log(0.3/0.6) = 3.04897

ph = 3.04897

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