Making Salts Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what's on both sides.
  • Make sure you understand the information on each card. If something's unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It's useful to remember specific examples to understand these concepts better.

PERSONALISED 1-TO-1 TUTORING

Need more help on this topic? Get 1-to-1 support

Get support with clear explanations, practice and feedback (Ages 5 to 16).

  • DBS-checked tutors
  • Flexible times
  • Parents can be updated
Book a free 10-min call See pricing

Want an ad-free experience? Subscribe to remove ads

In chemistry, what is a salt?

A salt is a type of chemical. It forms when the hydrogen in an acid is swapped for a metal or ammonium ion.

Name three types of substance that acids can react with to make salts.

Acids can react with metals, bases and metal carbonates to make salts. Bases include metal oxides and metal hydroxides, and soluble bases are called alkalis.

What method do we use to make a soluble salt if one reactant is an insoluble solid, such as a metal oxide?

We react the acid with an excess of the insoluble solid. Then we filter off the extra solid and crystallise the salt from the solution.

Why do we add an insoluble base in excess when making a soluble salt from an acid and an insoluble base?

We add the base in excess to make sure all the acid has reacted. Any extra base stays as a solid and can be removed by filtration.

Describe the main steps to make pure, dry crystals of a soluble salt from an acid and an insoluble base.

Warm the acid gently. Add the insoluble base in small amounts and stir until no more reacts. Filter to remove the extra solid. Heat the clear solution to evaporate some water, then leave it to cool so salt crystals form. Remove and dry the crystals.

What method do we use to make a soluble salt from an acid and a soluble alkali?

We use a titration. We add one solution from a burette to a measured volume of the other with an indicator. This shows the exact volume needed for neutralisation. We then crystallise the salt from the neutral solution.

Why can we not just add excess alkali and filter it off when making a salt from an acid and an alkali?

Because both the acid and the alkali are in solution. A filter only removes solids, so you cannot filter off extra liquid alkali.

Describe how to make pure crystals of a soluble salt after you have found the correct volumes in a titration.

Repeat the titration using the same volumes but without indicator. Heat the neutral solution to evaporate some water, then leave it to cool so crystals form. Remove and dry the crystals.

How do we make an insoluble salt using a precipitation reaction?

Mix two solutions that each contain one of the ions needed for the salt. An insoluble solid called a precipitate forms. Filter, wash and dry the solid to get the pure insoluble salt.

Give an example of making a salt by reacting copper oxide with sulfuric acid. Name the salt and say if it is soluble.

Copper oxide reacts with sulfuric acid to make copper sulfate and water. Copper sulfate is a soluble salt.

Previous Topic
Back to Lesson
Next Topic