Question

5.) Enter your answer in the provided box.

Calculate the following quantity: volume of 1.551 M copper(II) nitrate that must be diluted with water to prepare 946.4 mL of a 0.9513 M solution.

__?___ mL

6.) .  Enter your answer in the provided box.

How many milliliters of 0.836 M HCl are needed to react with 28.8 g of CaCO₃?

2HCl(aq) + CaCO₃(s) → CaCl₂(aq) + CO₂(g) + H₂O(l)

__?__ mL

7.) . Enter your answer in the provided box. Sodium hydroxide is used extensively in acid-base titrations because it is a strong, inexpensive base. A sodium hydroxide solution was standardized by titrating 25.47 mL of 0.1070 M standard hydrochloric acid. The initial buret reading of the sodium hydroxide was 1.74 mL, and the final reading was 32.17 mL. What was the molarity of the base solution? __?___M

Answer 1

5)

use dilution formula

M1*V1 = M2*V2

1---> is for stock solution

2---> is for diluted solution

Given:

M1 = 1.551 M

M2 = 0.9513 M

V2 = 946.4 mL

use:

M1*V1 = M2*V2

V1 = (M2 * V2) / M1

V1 = (0.9513*946.4)/1.551

V1 = 580.5 mL

Answer: 580.5 mL

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