What masses of dimethylamine and dimethylammonium chloride do you need to prepare 2.00 L of pH = 12.00 buffer if the total concentration of the two components is 0.500 M?

How many grams of solid potassium acetate should be added to 1.50 L of a 0.151 M acetic acid solution to prepare a buffer with a pH of 5.734 ? grams potassium acetate = g.

How much 5.50 M NaOH must be added to 480.0 mL of a buffer that is 0.0215 M acetic acid and 0.0260 M sodium acetate to raise the pH to 5.75?

-5 %3D A chemistry graduate student is given 450. mL of a 0.30 M acetic acid (HCH,CO,) solution. Acetic acid is a weak acid with K = 1.8 × 10 . What mass of a NaCH,CO, should the student dissolve in the HCH,CO, solution to turn it into a buffer with pH =4.29? 2

The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 0.200 M and the sodium lactate concentration is 2.00 M?

How much 6.01 M NaOH must be added to 690.0 mL of a buffer that is 0.0190 M acetic acid and 0.0230 M sodium acetate to raise the pH to 5.75?

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 NH3 + 10 mL of 0.1 M HCNO 10 mL of 0.1 M NH3 + 5.0 mL of 0.1 M HCl (Correct answer) 10 mL of 0.1 M HCNO + 10 mL of 0.1 M NaOH 10 mL of 0.1 M HCNO + 5.0 mL of 0.1 M NaOH   please explain. thanks!

-3 A chemistry graduate student is given 450. mL of a 1.10M diethylamine ((C₂H), NH) solution. Diethylamine is a weak base with K₂ = 1.3 × 10¯ What mass of (C₂H₂)2NH₂Cl should the student dissolve in the (C₂H5) NH solution to turn it into a buffer with pH = 11.25? You may assume that the volume of the solution doesn't change when the (C₂H5) NH₂Cl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. 0 Explanation 85°F Mostly sunny Check $ D x10 X C % S E F6 Q Search. F7 & L FB a * F9 F10 Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessi *- F11 *+ F12 PrtSc Insert Delete 4)

7) How many mL of 1.778 M HCl should be added to 355 mL of 0.282 M aminobenzene (ABz), a weak base, before diluting to 1 L to prepare a buffer at pH 4.44? pKa= 4.601 HABz+ NA

How many grams of solid ammonium chloride should be added to 2.00 L of a 0.203 M ammonia solution to prepare a buffer with a pH of 8.480 ? grams ammonium chloride =  g.