The balanced equation for the formation of uric acid from purine should be written. Concept introduction: In a balanced equation the number of atoms of each element as a reactant is equal to the number of atoms of that element as a product. Coefficient is a number placed before a formula in a chemical equation. A balanced equation should be obeying the law of conservation of mass. Law of conservation of mass states that, the number of atoms remains constant throughout the reaction, simply it can be stated as follows, “during a chemical reaction atoms are neither be created nor be destroyed”. A precipitation reaction takes place when two solutions of well soluble substances together form a poorly soluble salt.

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Chapter 5.3, Problem 5.2CIAP

(a)

Interpretation Introduction

Interpretation: The balanced equation for the formation of uric acid from purine should be written.

Concept introduction:

In a balanced equation the number of atoms of each element as a reactant is equal to the number of atoms of that element as a product.

Coefficient is a number placed before a formula in a chemical equation.

A balanced equation should be obeying the law of conservation of mass. Law of conservation of mass states that, the number of atoms remains constant throughout the reaction, simply it can be stated as follows, “during a chemical reaction atoms are neither be created nor be destroyed”.

A precipitation reaction takes place when two solutions of well soluble substances together form a poorly soluble salt.

(b)

Interpretation Introduction

Interpretation: The type of reaction should be determined.

Concept introduction:

Reactions of ionic compounds can be grouped into three and they are,

1. Precipitation reaction: A precipitation reaction takes place when two solutions of well soluble substances together form a poorly soluble salt.

2. Acid- base neutralization reaction: it is a double displacement reaction in which an acid and a base react to form an ionic compound (salt) and water.

3. Oxidation-reduction reaction: Both the oxidation and reduction reaction occurs together in a chemical reaction. It is also known as redox reaction.

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