Watered Dilutions LAB

Watered Dilutions LAB

10th Grade

10 Qs

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Watered Dilutions LAB

Watered Dilutions LAB

Assessment

Quiz

Chemistry

10th Grade

Practice Problem

Easy

Created by

Nathaniel Query

Used 3+ times

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10 questions

Show all answers

1.

OPEN ENDED QUESTION

3 mins • 1 pt

Media Image

The first square shows a tiny volume of 0.010 M HCl. Sketch what you expect to see in the same tiny volume when you dilute with water as indicated. Calculate the molarity and the pH of the two new solutions.

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2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many drops of the 0.010 M HCl solution would you need in order to have the same number of hydrogen ions as in one drop of 0.10 M HCl?

20
10
15
5

3.

OPEN ENDED QUESTION

3 mins • 1 pt

Media Image

Predict the pH for three successive dilutions of 0.010 M HCl as indicated in the table. For each successive dilution, 9 mL of water is added to 1 mL of solution.

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4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Suppose you have 0.010 M sodium hydroxide, NaOH, with a pH of 12. Predict the pH if you add 9 mL of water to 1 mL of 0.010 M NaOH.

pH 11

pH 12

pH 13

pH 14

Answer explanation

The OH concentration becomes 1 x 10–3 M, making the H+ concentration 1 x 10–11 M. So, the pH is 11.

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

How much would you have to dilute 0.010 M NaOH to get a pH of 10?

You have to dilute 1 mL of solution to 100 mL

You have to dilute 1 mL of solution to 10 mL

You have to dilute 1 mL of solution to 1000 mL

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If you came up with an experiment in order see if you could get Solution 4 to obtain a pH greater than 7 what dilution, what would you conclude?

Add more acidic substance to Solution 4.
Increase the temperature of Solution 4.
Dilute Solution 4 with a basic substance.

You cannot change the nature of a solution via dilution.

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

What happens to the pH of an acid or basic solution when it is diluted with water?

The pH increases

The pH decreases

The pH approaches 7

The pH increases past 7

Answer explanation

The pH approaches 7. This is the pH of pure water. As more and more water is added, the acid or base spreads out into a larger and larger volume until the number of moles per liter equals 1 x10–7

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