A buffer solution with a pH of 3.86 is prepared with 0.50 M formic acid and M sodium formate. The K, of formic acid is 1.8 x 10 4. O 5.0 x 10-8 O 0.33 O 2.3 x 10-5 O 0.65 O 1.3

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4. What is the pH of a buffer made from 0.42 M H3BO3 and 0.22 M H2BO3-, if the Ka for H3BO3 is 7.3 x 10-10 ? (use 2 decimal places for pH)

What ratio of base to acid is needed to make a buffer with formic acid, HCOOH, and potassium formate, KHCOO buffer with pH = 3.76? Enter the ratio as a decimal

An buffer is prepared by combining 4 L of a 0.57 M X solution with 4 L of an 0.57 molar HXCI solution. The K, of X is 4.54 ×10-3. What is the pH of this buffer solution? Please express your answer to the second decimal place.

O ACIDS AND BASES Calculating the pH of a weak base titrated with a strong acid with a 0.3000 M solution of HNO,. The p K, of An analytical chemist is titrating 160.2 mL of a 0.5000 M solution of dimethylamine ((CH₂)2NH) w dimethylamine is 3.27. Calculate the pH of the base solution after the chemist has added 280.8 mL of the HNO, solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO, solution added. Round your answer to 2 decimal places... PH-0 X

A buffer solution with a pH of...