Question

name type here date type here
writing chemical formula & balancing chemical equations - slide 11
write the coefficients to balance the equations in the given boxes. write the missing reactants and/or the products on the blanks:
$\boldsymbol{2}$ mg + $\boldsymbol{1}$ o$_2$ ------> $\boldsymbol{2}$ mgo
magnesium oxygen magnesium oxide
type here fe + type here hcl ------> type here fecl$_2$ + type here h$_2$
iron type here type here hydrogen

Explanation:

Step1: Balance Fe atoms

Fe is balanced initially: 1 Fe on each side.
Coefficient for Fe: $1$

Step2: Balance Cl atoms

2 Cl in $\text{FeCl}_2$, so HCI needs coefficient 2:
Coefficient for HCI: $2$

Step3: Balance H atoms

2 H from 2 HCI, so $\text{H}_2$ has coefficient 1:
Coefficient for $\text{H}_2$: $1$

Step4: Identify missing names

HCI is Hydrochloric Acid; $\text{FeCl}_2$ is Iron(II) Chloride.

Answer:

Coefficients (left to right): $1$, $2$, $1$, $1$
Missing names:

• HCI: Hydrochloric Acid
• $\text{FeCl}_2$: Iron(II) Chloride

Balanced equation: $\text{Fe} + 2\text{HCl}
ightarrow \text{FeCl}_2 + \text{H}_2$