(1) Careless Carlie weighed her KHP sample, but forgot to bring her reportsheet along, so she recorded the mass of KHP on a paper towel. During her titration, which required 18.46 mL of base, she spilled some base on her hands. She remembered to wash her hands, but forgot about the data on the towel, and used it to dry her hands. When she went to calculate the molarity of the base, Carlie discovered that she didn’t have the mass of her KHP. Her kindhearted instructor told Carlie that her base was 0.2987 M. Calculate the mass of Carlie’s KHP sample. Show calculations   (2) What mass of solid NaOH would be needed to make 645 mL of Carlie’s NaOH solution? Show calculations.

Question
Asked May 2, 2019
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(1) Careless Carlie weighed her KHP sample, but forgot to bring her report
sheet along, so she recorded the mass of KHP on a paper towel. During her titration, which required 18.46 mL of base, she spilled some base on her hands. She remembered to wash her hands, but forgot about the data on the towel, and used it to dry her hands. When she went to calculate the molarity of the base, Carlie discovered that she didn’t have the mass of her KHP. Her kindhearted instructor told Carlie that her base was 0.2987 M. Calculate the mass of Carlie’s KHP sample. Show calculations
 
 
 
(2) What mass of solid NaOH would be needed to make 645 mL of Carlie’s NaOH solution? Show calculations.
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Expert Answer

Step 1

(1)

The relationship between mass, moles and molar mass of a substance is given by,

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Step 2

Calculate the moles of NaOH used in the titration,

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Step 3

In the given titration, for each 0.0055 moles of NaOH, same moles of KHP w...

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Quantitative analysis

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