Q22 of 152 Page 19

Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.

Physical State of reactants and products can be shown by putting the “State Symbols” in an equation.

For example:


Zn (s) + H2SO4 (aq.) → ZnSO4 (aq..) + H2 (g)



More from this chapter

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21 Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction. 21 Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a ba lanced chemical equation for this reaction. 22 Balance the following equation and add state symbols:

Zn + HCl ZnCl2 + H2

 22 Convey the following information in the form of a balanced chemical equation:

"An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution."