Question

(a) What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
(b) Write balanced chemical equation from the following information
An aqueous calcium hydroxide solution (lime water) reacts with carbon dioxide gas to produce a solid calcium carbonate precipitate and water.

Answer 1

(a) Chemical equation:

A chemical equation is used to define the reaction taking place under certain circumstances with certain material to produce particular product in particular state. A chemical reaction is made more informative with the symbols used in the equation.

Some of the symbols are given below:

• The physical 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.
• The down arrow defines the product is a precipitate.
• The up arrow defines the product formed gas.
• The arrow pointed to right defines that the product is formed.
• The two arrows pointed in opposite directions indicates the reaction is a reversible reaction.
• The right arrow with a triangle on the upper side indicates the reactants are heated.
• The right arrow with a unit of pressure on the upper side indicates pressure of the reaction.
• The right arrow with a unit of temperature on the upper side indicates temperature of the reaction.
• The right arrow with a chemical formula of element/compound defines the reactants are catalyzed by the particular element/compound.
• A chemical reaction with $\bold{e^-}$ defines electrolysis process.

(b) Balanced chemical reaction:

$\bold{2 C a(O H)_{2(a q)}+2 C O_{2(g)} \rightarrow 2 C a C O_{3(g)} \downarrow+2 H_{2} O_{(l)}}$

With the information given in the question above equation is formed.

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) 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.

https://brainly.in/question/13629102

(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