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
What is the type of titration method employed
in this case?
- Direct
- Residual
- Either
- None
If this is a residual reaction, which is the back
titrant?
- Sulfuric acid
- Sodium hydroxide
- Zinc oxide
- None because it is a direct titrimetric
method
What is the factor of the analyte?
- 1
- 2
- 3
- 4
What is the mEq of the analyte?
- 0.04900
- 0.04069
- 0.02000
- 0.02900
What is the normality of the acid?
- 0.2808 N
- 0.5616 N
- 1.123 N
- 2.2464 N
What is the normality of the basic titrant?
- 0.4883 N
- 0.9765 N
- 1.953 N
- 3,906 N
What is the %purity of magnesium oxide in the
sample?
- 27.48 ml
- 17.67 ml
- 43.44 ml
- 19.78 ml
What is the actual amount of zinc oxide in the
sample?
- 0.2969 g
- 0.5938 g
- 1.1875 g
- 2.375 g
The given case does not have a sharp
end point to perform a direct titration.
- True
- False
. The applicable chemical indicator for
this case is methyl orange.
- True
- False
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