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The analyst wanted to measure the zinc oxide content of a 1.25-g sample. The sample was treated with 50 mL of 0.5615 M sulfuric acid. Then, the resulting mixture was also treated with 0.9765 M sodium hydroxide. The resulting purity was 95.0% ZnO.    Which of the following substances is the titrant? Sulfuric acid Sodium hydroxide Both A and B Zinc oxide Which of the following substances is the analyte? Zinc oxide Sodium hydroxide Sulfuric acid B or C What is the type of aqueous neutralization process employed in this case? Acidimetic titration Alkalimetric titration Precipitimetric titration Complexometric titration

The analyst wanted to measure the zinc oxide content of a 1.25-g sample. The sample was treated with 50 mL of 0.5615 M sulfuric acid. Then, the resulting mixture was also treated with 0.9765 M sodium hydroxide. The resulting purity was 95.0% ZnO.    Which of the following substances is the titrant? Sulfuric acid Sodium hydroxide Both A and B Zinc oxide Which of the following substances is the analyte? Zinc oxide Sodium hydroxide Sulfuric acid B or C What is the type of aqueous neutralization process employed in this case? Acidimetic titration Alkalimetric titration Precipitimetric titration Complexometric titration

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter15: Equilibria Of Other Reaction Classes
Section: Chapter Questions
Problem 51E: Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production...
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The analyst wanted to measure the zinc oxide

content of a 1.25-g sample. The sample was

treated with 50 mL of 0.5615 M sulfuric acid. Then,

the resulting mixture was also treated with 0.9765

M sodium hydroxide. The resulting purity was 95.0%

ZnO. 

 

Which of the following substances is the

titrant?

  1. Sulfuric acid
  2. Sodium hydroxide
  3. Both A and B
  4. Zinc oxide

Which of the following substances is the

analyte?

  1. Zinc oxide
  2. Sodium hydroxide
  3. Sulfuric acid
  4. B or C

What is the type of aqueous neutralization

process employed in this case?

  1. Acidimetic titration
  2. Alkalimetric titration
  3. Precipitimetric titration
  4. Complexometric titration

What is the type of titration method employed

in this case?

  1. Direct
  2. Residual
  3. Either
  4. None

If this is a residual reaction, which is the back

titrant?

  1. Sulfuric acid
  2. Sodium hydroxide
  3. Zinc oxide
  4. None because it is a direct titrimetric

method

What is the factor of the analyte?

  1. 1
  2. 2
  3. 3
  4. 4

What is the mEq of the analyte?

  1. 0.04900
  2. 0.04069
  3. 0.02000
  4. 0.02900

What is the normality of the acid?

  1. 0.2808 N
  2. 0.5616 N
  3. 1.123 N
  4. 2.2464 N

What is the normality of the basic titrant?

  1. 0.4883 N
  2. 0.9765 N
  3. 1.953 N
  4. 3,906 N

What is the %purity of magnesium oxide in the

sample?

  1. 27.48 ml
  2. 17.67 ml
  3. 43.44 ml
  4. 19.78 ml

What is the actual amount of zinc oxide in the

sample?

  1. 0.2969 g
  2. 0.5938 g
  3. 1.1875 g
  4. 2.375 g

The given case does not have a sharp

end point to perform a direct titration.

  1. True
  2. False

. The applicable chemical indicator for

this case is methyl orange.

  1. True
  2. False

 

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