pH test

Front

What is the pH scale?

Back

The pH scale is a measure of how acidic or basic a solution is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is an acid?

Back

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

Front

What is a base?

Back

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

Front

What is a neutral solution?

Back

A neutral solution has a pH of 7, meaning it is neither acidic nor basic.

Front

What is the significance of pH in biological systems?

Back

pH is crucial in biological systems as it affects enzyme activity, metabolic processes, and overall cellular function.

Front

How does pH affect enzyme activity?

Back

Each enzyme has an optimal pH range; deviations can lead to decreased activity or denaturation.

Front

What is a strong acid?

Back

A strong acid is one that completely dissociates in solution, releasing all of its protons (H+). Examples include hydrochloric acid (HCl) and sulfuric acid (H2SO4).

Front

What is a strong base?

Back

A strong base is one that completely dissociates in solution, releasing hydroxide ions (OH-). Examples include sodium hydroxide (NaOH) and potassium hydroxide (KOH).

Front

What is a weak acid?

Back

A weak acid partially dissociates in solution, meaning not all of its protons are released. Examples include acetic acid (CH3COOH) and citric acid.

Front

What is a weak base?

Back

A weak base partially dissociates in solution, meaning not all of its hydroxide ions are released. Examples include ammonia (NH3) and sodium bicarbonate (NaHCO3).