Answer Happy

12. (6 pts) What combination of substances will give a solution buffered at a pH of 3.50 (at 25°C)? a) 1.26 M HNO₂ and 1.00 M NaNO₂ b) 1.00 M HNO₂ and 1.26 M NaNO₂ c) 1.00 M NaHCO3 and 0.661 M Na₂CO3 d) 0.661 M NaHCO3 and 1.00 M Na₂CO3 e) 3.16×10 M HCl and 3.16×10¯ M NaCl