Problem 1. You are asked to prepare a pH = 10.7 buffer starting from 517 mL...

Question

Question

Answer 1

Answer #1

1) pt = 10.7 (c) pkb = -log K6 = 4.72 pra = 9.28 mass of NH 3 = 18.79 during Moles of NH3 = 18.7/12 = 1) pH = pra +log/ban/ a

Answer 2

Similar Homework Help Questions

please show show work, very confused! will RATE Problem 1. You are asked to prepare a...

please show show work, very confused! will RATE Problem 1. You are asked to prepare a pH = 10.0 buffer starting from 517 mL of water to which 21.8 g of ammonia have been added. The buffer will be prepared by the addition of ammonium chloride. The Kb of ammonia add to water is 1.99x105. Assume that the volume does not change on the addition of ammonia or ammonium chloride. (a) Write the balanced net ionic equation for ammonia added...
4) A buffer solution is prepared by dissolving 5.40 g of ammonium chloride in 20.0 mL...

4) A buffer solution is prepared by dissolving 5.40 g of ammonium chloride in 20.0 mL of water a mixing it with 35.0 mL of 10.0 Mammonia. Ky for ammonia is 1.8x10° a) What is the pH of this buffer solution b) This buffer solution is diluted with water to volume of 100.0 mL and 5.00 mL of 0.500 M HCl are added to the 100.0 mL of buffer. What is the expected pH of the buffer solution after the...
you are asked to prepare a pH= 9.43 buffer starting from 60.0mL of 0.10M solution of...

you are asked to prepare a pH= 9.43 buffer starting from 60.0mL of 0.10M solution of ammonia, NH3, And 0.1M NH4Cl. (Kb for NH3= 1.8x10^-5) How many mL of NH4Cl should be added to prepare buffer solution?

Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH=...

Your supervisor asks you to prepare 474.00 mL of ammonium buffer solution 0.1 M with pH= 9.00, from a concentrated ammonia solution (16%w/w, d=0.98g/mL) and solid ammonium chloride (97% w/w). (MW of NH3 = 17.031 g/mol and FW of NH4Cl = 53.491 g/mol and pKa NH4+/NH3 =9.24). How many grams of the solid ammonium chloride do you need? Consider two decimal places for the answer.
Part 1: Buffers Considering the acetic acid sodium acetate buffer, complete the table below NaOH added/mL....

Part 1: Buffers Considering the acetic acid sodium acetate buffer, complete the table below NaOH added/mL. measured pH 0.0 20 Did the pH change a little or a lot when NaOH was added to the butter? Was the change you observed consistent with the action of a butter? For the ammonium chloride-ammonia buffer give the measured pH for the 50.0 mL of 0.10 Mammonia. Is this solution acidic, neutral, or basic? Did the pH of the ammonia increase or decrease...
18. You are asked to prepare a pH = 8.60 buffer starting from 500 mL of...

18. You are asked to prepare a pH = 8.60 buffer starting from 500 mL of 0.10 M solution of hydrocyanic acid, HCN, and excess sodium cyanide, NACN. (Ka for HCN = 4.9 x 10-10) a) What is the pH of the hydrocyanic acid solution prior to adding NACN? b) How many grams of NaCN should be added to prepare the buffer solution?

You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200M solution of...

You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200M solution of benzoic acid (C6H5COOH) and an excess of sodium benzoate (C6H5COONa). How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small volume change that occurs when the sodium benzoate is added.
You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.00 using only...

You are asked to prepare 500. mL 0.150 M acetate buffer at pH 5.00 using only pure acetic acid (MW = 60.05 g/mol, pKa = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500. mL buffer? Note that the given concentration of acetat refers to the concentration of all acetate species in solution. mass: What volume of 3.00 M NaOH, must be added to the acetic acid to achieve a...
You are asked to prepare 500 mL 0.300 M acetate buffer at pH 4.90 using only...

You are asked to prepare 500 mL 0.300 M acetate buffer at pH 4.90 using only pure acetic acid (MW = 60.05 g/mol pk, = 4.76), 3.00 M NaOH, and water. How many grams of acetic acid will be needed to prepare the 500 mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. mass: What volume of 3.00 M NaOH, must be added to the acetic acid to achieve a...

12. You are asked to prepare 500. mL of a 0.200 M acetate buffer at pH...

12. You are asked to prepare 500. mL of a 0.200 M acetate buffer at pH 4.90 using only pure acetic acid (MW=60.05 g/mol, pKa=4.76), 3.00 M NaOH, and water. Answer the following questions regarding the preparation of the buffer. a) How many grams of acetic acid will you need to prepare the 500 mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution. g=? B) What volume of 3.00 M...