Question

chemical reactions
\writing formula equations\ - ws #1
directions: convert the following word equations into formula equations by changing element
and compound names into chemical formulas.

1. sodium + oxygen → sodium oxide
2. copper + silver nitrate → copper(ii) nitrate + silver
3. aluminum chlorate + barium sulfate → aluminum sulfate + barium chlorate
4. bromine + calcium iodide → calcium bromide + iodine
5. zinc sulfide + magnesium arsenate → zinc arsenate + magnesium sulfide
6. cobalt + lead(ii) nitrite → cobalt(iii) nitrite + lead
7. potassium + water → potassium hydroxide + hydrogen

Explanation:

Problem 1:

Step1: Identify formulas

Sodium: \( \text{Na} \), Oxygen: \( \text{O}_2 \), Sodium Oxide: \( \text{Na}_2\text{O} \)

Step2: Write equation

\( 4\text{Na} + \text{O}_2
ightarrow 2\text{Na}_2\text{O} \) (Balanced by ensuring same number of each atom on both sides: 4 Na, 2 O on both)

Step1: Identify formulas

Copper: \( \text{Cu} \), Silver Nitrate: \( \text{AgNO}_3 \), Copper(II) Nitrate: \( \text{Cu(NO}_3\text{)}_2 \), Silver: \( \text{Ag} \)

Step2: Balance equation

\( \text{Cu} + 2\text{AgNO}_3
ightarrow \text{Cu(NO}_3\text{)}_2 + 2\text{Ag} \) (2 Ag, 2 NO₃ on both sides)

Step1: Identify formulas

Aluminum Chlorate: \( \text{Al(ClO}_3\text{)}_3 \), Barium Sulfate: \( \text{BaSO}_4 \), Aluminum Sulfate: \( \text{Al}_2(\text{SO}_4)_3 \), Barium Chlorate: \( \text{Ba(ClO}_3\text{)}_2 \)

Step2: Balance equation

\( 2\text{Al(ClO}_3\text{)}_3 + 3\text{BaSO}_4
ightarrow \text{Al}_2(\text{SO}_4)_3 + 3\text{Ba(ClO}_3\text{)}_2 \) (2 Al, 6 ClO₃, 3 Ba, 3 SO₄ on both sides)

Answer:

\( 4\text{Na} + \text{O}_2
ightarrow 2\text{Na}_2\text{O} \)

Problem 2: