Question

1) How is the concentration of hydronium ions (H2O) affected when a
solution of an acid is diluted?

2) How is the concentration of hydroxide ions (OH) affected when excess
base is dissolved in a solution of sodium hydroxide?

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Answer 1

Answer:

it decreases when acid diluted

2 increases

Explanation:

Answer 2

Answer:

Hope it's helpful

Explanation:

1)

The concentration of hydronium ions decreases when an acid is diluted because on adding water the H+ ions of the acid and hydroxyl ions of water react to form water molecules and the concentration of hydronium ions decreases.

2)

When an excess base is dissolved in a solution of sodium hydroxide. Sodium hydroxide dissociates into OH- ions and when the number of OH- increases then concentration also increases because concentration is the number of OH- ions present per unit volume.