Reactions of acids and making salts

What is the general reaction between an acid and a metal?

Acid + metal → salt + hydrogen.

What gas is produced when acids react with metals?

Hydrogen.

What is the general reaction between an acid and a metal oxide?

Acid + metal oxide → salt + water.

What is the general reaction between an acid and a metal hydroxide?

Acid + metal hydroxide → salt + water.

What is the general reaction between an acid and a metal carbonate?

Acid + metal carbonate → salt + water + carbon dioxide.

How do you test for hydrogen?

Use a lit splint; hydrogen gives a squeaky pop.

How do you test for carbon dioxide?

Bubble it through limewater; it turns milky/cloudy.

Why is excess insoluble reactant added when preparing a soluble salt?

To ensure all the acid reacts.

Why is excess insoluble reactant removed?

It cannot dissolve and would contaminate the salt solution.

How is excess insoluble reactant removed?

By filtration.

What remains after filtering an acid-insoluble reactant mixture?

A solution containing only salt and water.

Why is titration needed with a soluble reactant?

You cannot remove excess soluble reactant by filtration.

What is titration used to determine?

The exact volumes needed for complete neutralisation.

Why are acid and soluble reactant mixed in correct proportions?

To ensure neither soluble reactant remains in excess.

What remains after correct neutralisation of two soluble reactants?

Only salt and water.