Question

List the three requirements for a correctly written chemical equation.2. Give one example of a word equation, one example of a formula equation, and one example of a chemical equation.3. Write formulas for each of the following compounds.a. potassium hydroxide b. calcium nitrate

Answer 1

Requirements for a correctly written chemical equation are reactants and products, their formula and valency

Step-by-step explanation:

Formula of the given compound are -

1 - Potassium Hydroxide -
`KOH`

2 - Calcium Nitrate -
`Ca(NO_3)_2`

The requirements for a correctly written chemical equation are -

• Identifying reactants and products
• Formula of reactants and products
• Valency of elements

Example of word equation, formula equation, and chemical equation is as follows -

Aluminium + iron9(III)oxide ⇒ aluminium oxide + iron (word equation)

`Al_(_s_)` +
`Fe_2O_3_(_s_)` ⇒
`Al_2O_3_(_s_)` +
`Fe_(s)` (formula equation)

`2Al_(_s_)` +
`Fe_2O_3_(_s_)` ⇒
`Al_2O_3_(_s_)` +
`2Fe_(_s_)` (chemical equation)