Question

(a) Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.
(b) Balance the following equation and add state symbols
Zn + HCl → ZnCl2 + H2
(c) 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.""

Answer 1

(a) Physical state in chemical reaction:

The state of the reactants and products are defined with the (s) if it is solid; (cr) if it is crystal; (l) if it is liquid; (g) if it is gas; (aq) if it is aqueous solution.

Example 1: Formation of liquid.

$\bold{2 H_{2(g)}+O_{2(g)} \rightarrow 2 H_{2} O_{(l)}}$

The hydrogen gas and oxygen gas reacts to form water which is a liquid.

Example 2: Formation of solid.

$\bold{A g N O_{3(a q)}+K C l_{(a q)} \rightarrow A g C l_{(s)}+K N O_{3(a q)}}$

The combination of aqueous silver nitrate and aqueous potassium chloride forms silver chloride which is a precipitate with potassium nitrate in the solution.

Example 3: Formation of gas.

$\bold{2 H C l_{(g)}+F_{2(g)} \rightarrow 2 H F_{(g)}+C l_{2(g)}}$

The hydrogen chloride gas reacts with fluorine gas to forms chloride gas with hydrogen fluoride gas.

(b) Balanced chemical reaction:

$\bold{Z n_{(S)}+2 H C l_{(g)} \rightarrow Z n C l_{2(s)}+H_{2(g)}}$

(c) Balanced chemical reaction:

$\bold{F e S O_{4(a q)}+2 N a O H_{(a q)} \rightarrow F e(O H)_{2(s)}+N a_{2} S O_{4(a q)}}$

You can get all the answers of Chapter 1 in the link below:

https://brainly.in/question/13848082

Few questions related to this chapter:

(a) Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.

(b) Balance the following chemical equation

MnO2 + HCl → MnCl2 + Cl2 + H2O

https://brainly.in/question/13629268

(a) Substitute formulae for names and balance the following equation

Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.

(b) Write balanced chemical equation with state symbols for the following reaction

Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.

https://brainly.in/question/13629271