8) What weight of sodium carbonate (Na2CO3) and sodium bicarbonate (NaHCO3) are required to make 100 mls of a 0.1 M buffer, pH 9.8 (pKa1of H2CO3= 6.1, pKa2= 10.3, MW of Na2CO3= 106 g/mol, MW of NaHCO3= 84 g/mol)?

A 100.0 mL buffer solution is 0.110 mol L-¹ in CH3NH2 and 0.130 mol L-¹ in CH3NH₂Br. Part A What mass of HCI will this buffer neutralize before the pH falls below 9.55? ( Kb (CH3NH₂) = 4.40 × 10-4) Express the mass in grams to two significant figures. mun shummu za

Which of the following aqueous mixtures will result in a buffer with a pH higher than 7.0? (For HCNO, Ka = 2.2×10-4, for NH3, Kb = 1.8×10-5 ) 10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCl   10 mL of 0.1 M HCNO + 5.0 mL of 0.1 M NaOH   10 mL of 0.1 M HCNO + 10 mL of 0.1 M NaOH   10 mL of 0.1 M NH3 + 5.0 mL of 0.1 M HCl   10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCNO

What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 x 104) and 0.200 mol of NaF to which 0.050 mol of NaOH were added?