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Identifying Acids and Bases pH Quiz

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Questions and Answers

What happens when acids dissociate in water?

They add H+ ions to the solution (correct)

They remove H+ ions from the solution

They add OH- ions to the solution

They form water molecules

Which characteristic is typically associated with bases?

Releasing hydrogen ions (H+)

Sour tasting

Corrosive

Bitter tasting (correct)

What does the pH scale measure?

Concentration of OH- ions in solutions

Concentration of water molecules in solutions

Concentration of salts in solutions

Concentration of H+ ions in solutions (correct)

Which substance is classified as an acid?

Bleach (contains ClO-) Signup and view all the answers

What is the significance of the pH scale being logarithmic?

It allows for a wider range of values to be represented Signup and view all the answers

What causes an increase in pH in a solution?

Presence of sodium hydroxide (NaOH) Signup and view all the answers

What do pH indicators do?

Change color in the presence of acids and/or bases Signup and view all the answers

Which chemical releases H+ ions into the solution?

Lactic acid (CH3CH2COOH) Signup and view all the answers

What is the classification of hydrogen chloride (HCl) in terms of acidity or basicity?

Acid Signup and view all the answers

In the context of the pH scale, what does the presence of ammonia (NH3) in a solution indicate?

Increase in pH Signup and view all the answers

Study Notes

Acid-Base Chemistry

When acids dissociate in water, they release H+ ions into the solution.

pH Scale

The pH scale measures the concentration of H+ ions in a solution, with a pH of 7 being neutral, below 7 being acidic, and above 7 being basic.
The pH scale being logarithmic means that each step down the scale represents a tenfold increase in H+ ion concentration.

Acids and Bases

Acids are substances that release H+ ions into a solution, such as hydrogen chloride (HCl).
Bases are typically associated with the characteristic of releasing OH- ions into a solution.

pH Indicators

pH indicators are substances that change color in response to changes in pH, indicating whether a solution is acidic or basic.

Effects on pH

An increase in pH in a solution is caused by a decrease in H+ ion concentration or an increase in OH- ion concentration.
The presence of ammonia (NH3) in a solution indicates a basic pH.

Acid Classification

Hydrogen chloride (HCl) is classified as a strong acid due to its complete dissociation in water, releasing H+ ions into the solution.

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Description

Test your knowledge of acids and bases by identifying where various substances fall on the pH scale. From tap water and rainwater to chemicals like hydrogen chloride, sodium hydroxide, and more, this quiz covers a wide range of substances.