Question

2
multiple answer 1 point
select the two products of the double replacement reaction below?
sodium hydroxide(aq) + cobalt(ii) acetate(aq) -->??? +???
sodium acetate(s)
sodium acetate(aq)
cobalt(ii) hydroxide(s)
cobalt(ii) hydroxide(aq)
previous

Explanation:

Step1: Write the chemical formula

Sodium hydroxide: \(NaOH\), cobalt(II) acetate: \(Co(CH_3COO)_2\).

Step2: Double - replacement reaction principle

In a double - replacement reaction \(AB + CD
ightarrow AD+CB\). Here \(A = Na^+\), \(B=OH^-\), \(C = Co^{2 +}\), \(D = CH_3COO^-\). The reaction is \(2NaOH(aq)+Co(CH_3COO)_2(aq)
ightarrow 2CH_3COONa(aq)+Co(OH)_2(s)\).

Step3: Solubility rule

According to solubility rules, sodium salts (\(Na^+\) salts) are generally soluble in water, so \(CH_3COONa\) is in aqueous (\(aq\)) form. Hydroxide salts of transition metals (such as \(Co^{2+}\)) are generally insoluble, so \(Co(OH)_2\) is in solid (\(s\)) form.

Answer:

B. sodium acetate(aq), C. cobalt(II) hydroxide(s)