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tigry1 [53]
3 years ago
6

Why must reagent bottles be closed when not in use?

Chemistry
1 answer:
Katen [24]3 years ago
7 0

Answer to your question.

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What is the pH of a 0.00001 M solution of HCI?
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Answer:

0.00001= 1 x 10^-5. Since HCl is an acid, 1 x10^-5 is the H+ concentration. Write only the number of the exponent. Therefore, pH = 5.

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How many grams of NaCl are needed to prepare 50.0 grams of 35.0% of salt solution?
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17.5 g

Explanation:

Given data

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The concentration by mass of NaCl in the solution is 35.0%, that is, there are 35.0 grams of sodium chloride per 100 grams of solution. We will use this ratio to find the mass of sodium chloride required to prepare 50.0 grams of a 35.0% salt solution.

50.0gSolution \times \frac{35.0gNaCl}{100gSolution} = 17.5gNaCl

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