Chemistry B (Salters) H033 Salters: Elements of life Topical Past Paper Questions

Knowledge of the structure of atoms developed gradually over time. By the year 1914 the arrangement of the electrons was still being worked out. A scientist called Neils Bohr studied atomic spectra and devised the idea of electrons being in energy levels. (a) Atomic spectra can b…

Ammonia, $ NH_{3} $, is an important gas that is made industrially on a very large scale. It has a wide range of uses such as the production of synthetic fertilisers like ammonium nitrate. The manufacture of ammonia occurs in the Haber process as shown in Equation 4.1. $$ \mathrm…

Hydrochloric acid is an important chemical both in industry and in the laboratory. The acid can be made by dissolving hydrogen chloride gas in water. (a) Hydrogen chloride gas can be prepared in the laboratory using the reaction between solid sodium chloride and concentrated sulf…