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12 Dec 2019

Calculate the pH of a solution prepared by mixing 125.0 mL of 0.178 M acetic acid (HC2H3O2) with 150.0 mL of Calculate the pH of a solution prepared by mixing 125.0 mL of 0.178 M acetic acid (HC2H3O2) with 222.5 mL of 0.100 M sodium hydroxide, NaOH.100 M sodium hydroxide, NaOH

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Reid WolffLv2

13 Dec 2019

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1) What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 90.0 mL of 0.0509 M NaOH and 60.0 mL of 0.0400 M Ba(OH)2?

2) What is the pH (to nearest 0.01 pH unit) of a solution prepared by mixing 78.0 mL of 0.604 M HCl and 69.0 mL of 0.823 M NaOH?

3) Calculate the pH of each of the solutions and the change in pH to 0.01 pH units caused by adding 10.0 mL of 2.54-M HCl to 470. mL of each of the following solutions.

Change is defined as final minus initial, so if the pH drops upon mixing the change is negative.

a) water

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b) 0.178 M C₂H₃O₂^1-

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pH after mixing=
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c) 0.178 M HC₂H₃O₂

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d) a buffer solution that is 0.178 M in each C₂H₃O₂^1- and HC₂H₃O₂

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4) Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.60-M NaOH is added to 550. mL of each of the following solutions.

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b) 0.176 M NH₄¹⁺

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c) 0.176 M NH₃

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Consider the titration of 30.0 mL of 0.189-M of KX with 0.172-M HCl. The pK_a of HX = 8.59. Give all pH values to 0.01 pH units.

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A 4.543-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of solution. 15.0 mL of this solution was titrated with 0.07921-M NaOH. The pH after the addition of 28.38 mL of base was 5.60, and the equivalence point was reached with the addition of 48.60 mL of base.

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A lot of these are similar problems, so if someone could let me know how to do them then I could probably figure the rest of them out. I was out of class the day we went over this and am completely lost.

1. a) What is the concentration of a solution prepared by mixing35.0 mL of 0.10M acetic acid with 15.0 ml of Water?

b)Calculate [H₃O⁺],[C₂H₃O₂^-], and[HC₂H₃O₂] in this solution

c)What is the pH of this solution?

d)Calculate [H₃O⁺],[C₂H₃O₂^-], and[HC₂H₃O₂] for a solution preparedby mixing 35.0 mL of 0.10 M acetic acid and 15 mL of 0.20 M sodiumacetate?

e)What is the pH of this solution?