Question

1: Write the positive and negative ions that result when the following compounds are dissolved in an aqueous solution:

Compound:
1. Na2CO3(a)
2. FeBr3(aq)
3. Al2(SO4)3(aq)

2: Write word and formula equations for the reaction of sodium hydroxide, NaOH(aq) and phosphoric acid, H3PO4(aq). Word equation_________. Formula equation________. Why does this reaction occur?

Answer 1

See explanation.

Step-by-step explanation:

Hello there!

In this case, for the required chemical reactions, we proceed as follows, by considering that the left-handed elements stand for the cations and the right-handed ones for the anions:

1:

1.
`Na_2CO_3(aq)\rightarrow 2Na^+(aq)+(CO_3)^(2-)(aq)`

2.
`FeBr_3(aq)\rightarrow Fe^(3+)(aq)+3Br^-(aq)`

3.
`Al_2(SO_4)_3(aq)\rightarrow 2Al^(3+)(aq)+3(SO_4)^(2-)(aq)`

2: In this case, we can represent the formula equation first according to the neutralization reaction:

`3NaOH(aq)+H_3PO_4(aq)\rightarrow Na_3PO_4(aq)+3H_2O(l)`

Which is worded as: three molecules of aqueous sodium hydroxide reacts with one molecule of aqueous phosphoric acid to yield one molecule of aqueous sodium chloride and three molecules of liquid water.

Regards!