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94 solutions

Buffer

Q. Calculate the pH of a solution that is 0.12 M in NH3 and 0.10 M in NH4Cl. Kb for NH3 is 1.8 × 10−5.

Solved • Aug 2, 2019

Buffer

Q. How do i solve this problem by writing the chemical equation, making the chart and solving for X b/c i cannot use the henderson hasslebach equation Is this buffer a solution yes or no 1) 2 x 10 ^-1 M NaCIO2 (aq) and 8 x 10 ^-1 M HCIO2 (aq) 2) 2 x10 ^ 5 M NaCIO2 (aq) and 8 x10 ^-2 M HCIO2 (aq) 3) 1 X 10 ^ 3 M NaCIO2 (aq) and 1 x 10 ^-3 M HCIO2 (aq)

Solved • Jul 28, 2019

Buffer

Q. Is this a buffer solution yes or no 1) 2 x10^-1 M NaCI02 (aq) and 8 x 10 ^-1 M HCIO2 (aq) 2) 2 x 10 ^-5 M NaCI02 (aq) and 8 x 10 ^-2 M HCIO2 (aq) 3) 1 x 10 ^-3 M NaCIO2 (aq) and 1 x 10 ^-3 M HCIO2 (aq)

Solved • Jul 28, 2019

Buffer

Q. Which one of the following solutions will form a buffer solution (after the reaction is completed)? (a) 50 mL of 1.0 M NaOH(aq) + 100 mL of 1.0 M HCl(aq) (b) 100 mL of 1.0 M NaOH(aq) + 50 mL of 1.0 M HCl(aq) (c) 100 mL of 1.0 M NH3(aq) + 50 mL of 1.0 M HCl(aq) (d) 50 mL of 1.0 M NH 3 (aq) + 100 mL of 1.0 M HCl(aq)

Solved • Jul 28, 2019

Buffer

Q. A 50.0-mL sample of a 0.100 Af solution of a week acid HA has an equilibrium pH of 4.00. After to = 10-3mol of a substance X rs added to the solution. rt is observed that the pH of the solution Increases What might be true about substance X7 X might be a strong base that partially neutralized some weak acid. II. X might be a strong acid that made the solution more addle. III. X might be a soluble ionic compound containing the anion A-

Solved • Jul 23, 2019

Buffer

Q. Use the henderson-hasselbalch equation to prepare 25 mL of an acetate buffer solution at pH 4.85 use outside reference materials in order to obtain the KA for the appropriate acid / base conjugate pair mixture (3M HC2H3O2 and NaC2H3O2 *3 H2O)

Solved • Jul 22, 2019

Buffer

Q. A solution is prepared at 25 °C that is initially 0.49 M in dimethylamine ((CH3)2NH), a weak base with Kb= 5.4 x 10-4, and 0.31 M in dimethylammonium chloride ((CH3) NH2C1).2 Calculate the pH of the solution. Round your answer to 2 decimal places.

Solved • Jul 16, 2019