Question

B.Answer the following questions in short.
1. State the conditions needed for a chemical reaction to occur.
2. Distinguish between reactants and products.
3. How is a chemical reaction represented by a chemical equation?
4. Distinguish between a chemical equation and a word equation
5. Define the term precipitate'
6. Rusting of iron is a chemical change. Identify the reactants and the products in the involved chemical reaction and write the word equation. ​

Answer 1

ANSWER: 1)reactants

2)reactant is something that is involved in the reaction in the initial stages, and produces the product after the whole process of reaction is done

And, product is/are the end result of the reaction

3) a) write the molecular formula of all the reactants and products involved in the reaction

b) balance the atoms of each element on both reactant and product side

c) write necessary related things involved:

example, i)any catalyst if involved

ii) state of the reactant and product

4) "3rd part" explains the whole thing

5) precipitate is one of the products i.e insoluble in the other product(i.e mostly liquid) and settles down in the beaker or test tube

6) reactants are iron(fe), oxygen(o2) and water(h2o)

4Fe + 3O2 + 6H2O → 4Fe(OH)3