QofD (Dec 11) Acids & Bases

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) in a solution and has a pH less than 7.

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What is a base?

Back

A base is a substance that accepts protons (H+) or donates hydroxide ions (OH-) in a solution and has a pH greater than 7.

Front

What is the pH scale?

Back

The pH scale measures the acidity or basicity of a solution, ranging from 0 (strongly acidic) to 14 (strongly basic), with 7 being neutral.

Front

What is phenolphthalein?

Back

Phenolphthalein is a pH indicator that turns pink in basic solutions and is colorless in acidic solutions.

Front

What happens to phenolphthalein in acidic solutions?

Back

In acidic solutions, phenolphthalein remains colorless.

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What happens to phenolphthalein in basic solutions?

Back

In basic solutions, phenolphthalein turns pink.

Front

What is electrical conductivity in solutions?

Back

Electrical conductivity is the ability of a solution to conduct electricity, which depends on the presence of ions.

Front

What is a strong acid?

Back

A strong acid is an acid that completely dissociates in water, producing a high concentration of H+ ions.

Front

What is a weak acid?

Back

A weak acid is an acid that partially dissociates in water, resulting in a lower concentration of H+ ions.

Front

What is a strong base?

Back

A strong base is a base that completely dissociates in water, producing a high concentration of OH- ions.