Question

Basic substances have a gritty texture.

TRUE

FALSE


A substance is added to pure water and the concentration of aqueous H+ ions increases. What kind of substance has been added to the water?

an acid

a base

water

either an acid or a base

Answer 1

1. Answer;

False

Explanation;

Bases have some of the following properties;

• They have a bitter taste
• They have a slimy, or soapy feel on fingers

• Most bases react with acids and precipitate salts.
• Strong bases may react violently with acids.

• Bases turn red litmus paper blue

2. Answer;

An acid

Explanation;

• When acids are dissolved in water, the concentration of the acid decreases and it becomes dilute.
• It dissociates in water to give H+ ions or hydrogen ions.
• All acidic solutions contain more hydrogen ions than hydroxide ions, therefore when added to water it increases the concentration of H+ ions in water, as water is a neutral substance whose concentration of H+ ions is equal to OH-.