Question

Indicate which solution in each pair has the lower pH.

(a)    0.2 M NaClO₂ or 0.1 M NaClO₂

(b)    0.1 M HClO₂ or 0.2 M HClO₂

(c)    water or 0.1 M NaOH

(d)    0.1 M HF or 0.1 M HNO₂

Answer 1

for #d values of Ka are not given for both weak Acids

0. 2M Nacioz a) 0:24 Nacioz - 01M Nacioz pH = { (14+ pka tleg)) (pH for Nacioz) means higher concentration wigher PH so (0.1m Nacioz has lower PH dne b) 01 M HClO 2 or 0-2 M HCIOZ pH = 4(akce - legs) = (PH for HC102) means higher concentration lower PH so 002M HClO2 has lower PH / de water or DH = 7 0:1 M Naol string base PH >7 (always) So Iweeter has lower PH]