Search our library of Chemistry GCSE questions

Top answers

Chemistry

GCSE

What transformations occur when turning limestone to quicklime then to slaked lime?

Calcium carbonate (limestone) is decomposed in order to form calcium oxide (quicklime) and carbon dioxide. The quicklime is then treated with water in order to give calcium hydroxide (slaked lime).

Answered by Sabina F. • Chemistry tutor

2880 Views

What is the difference between a reversible reactions which occurs in a closed system and an open system?

An Open System is one in which one or more of the reactants or products are able to escape from the container. A Closed System is one in which neither the reactants or the products can escape from the co...

Answered by Kawthar H. • Chemistry tutor

7229 Views

What is ionic and covalent bonding?

Ionic bonding occurs when a metal and non-metal react together. It involves the metal atom losing electrons from its outer shell to become a positive ion (as there are more positive protons in the nucleus...

Answered by Suraiyya J. • Chemistry tutor

4659 Views

Describe the general structure of an atom.

Atoms are made up of three subatomic particles. These are protons, electrons and neutrons. Protons are POSitivly charged. Neutrons are NEUtral. Electrons are negative (electic shocks are bad). The nucleus...

Answered by Miriam J. • Chemistry tutor

14307 Views

What is the point of learning about chemistry - how can it be applied to real life?

Chemistry is used daily in many different areas of work; the plastics that we use every day apply organic chemistry as they are synthesised using chemical reactions leading to long chains of carbon, hydro...

Answered by Saakshi B. • Chemistry tutor

2767 Views