Understanding pH and Acids

Understanding pH and Acids

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Aiden Montgomery

FREE Resource

The video tutorial explains how to calculate the pH of a 0.03 molar solution of hydrochloric acid (HCL). It begins by identifying HCL as a strong acid that dissociates completely into hydrogen ions (H+) and chloride ions (Cl-). The pH is calculated by taking the negative logarithm of the hydrogen ion concentration, which is 0.03 molar. The resulting pH is 1.5, confirming the acidic nature of the solution. The tutorial concludes with a brief summary of the calculation process.

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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What characteristic of hydrochloric acid makes it dissociate completely in water?

It is a strong acid.

It is a base.

It is a weak acid.

It is a neutral compound.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula used to calculate the pH of a solution?

pH = log(concentration of H+)

pH = concentration of H+

pH = -concentration of H+

pH = -log(concentration of H+)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the concentration of H+ ions in a solution is 0.03 M, what is the pH?

1.5

3.0

0.03

7.0

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the pH of hydrochloric acid expected to be below 7?

Because it is an acid.

Because it is neutral.

Because it is a salt.

Because it is a base.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the pH of a 0.03 molar solution of HCl?

7.0

3.0

0.03

1.5

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