Chemical Changes - Acid and Alkaline

Chemical Changes

Open Ended

Predict which nails will not rust and explain your answer.

A - in air and water

B - in air and salt water

C - edible oil and water

D - dry air

Reactions with Acid: Neutralisation

acid + alkaline ----> salt + water

https://javalab.org/en/neutralization_reaction_en/

Multiple Choice

In the three types of reactions with acid, a salt is always formed.

• True

• False

Multiple Choice

In the three types of reaction with acid, water is only formed in the neutralization reaction.

• True

• False

Multiple Choice

Carbon dioxide is formed when acid reacts with metal.

• True

• False

Reactions with acid

acid + alkaline --> salt + water

acid + metal --> salt + hydrogen gas

acid + carbonate --> salt + water + carbon dioxide

How do we find out the pH value of a solution?

https://amrita.olabs.edu.in/?sub=73&brch=3&sim=78&cnt=4

Using pH indicators which changes colour based on the acidity or alkalinity of a solution

Multiple Choice

A solution has a pH value of 8.

Is this solution an acid or alkaline?

• acid

• alkaline

Multiple Select

Solution A has a pH value of 2.

Solution B has a pH value of 3.

Solution C has a pH value of 9.

Which statement(s) is/are correct?

• Solution A is an acid.

• Solution B is more acidic.

• Solution C is weak acid.