Question

2. For the reaction between magnesium metal and hydrochloric acid (aq) producing magnesium chloride (aq) and hydrogen gas (a) write an equation or this reaction (b) balance the equation from Part (a). (c) classify the reaction. 3. For the reaction between aqueous silver nitrate and aqueous potassium chromate producing the precipitate (solid) silver chromate and aqueous potassium nitrate solution (a) Write a balanced equation for this reaction. (b) Write an ionic equation for this reaction. (c) Write the net ionic equation for Part (a) (d) Classify the reaction. 4. Nitrogen molecules and iodine molecules react to form nitrogen triiodide solid. (a) Write an equation for this reaction. (b) Balance the equation from Part (a). (c) Classify the reaction.

Answer 1

2)

a)

Mg(s) + HCl (aq) -> MgCl₂ (aq) + H₂(g)

b)

Mg(s) + HCl (aq) -> MgCl₂ (aq) + H₂(g)

Balance Cl:

Mg(s) + 2 HCl (aq) -> MgCl₂ (aq) + H₂(g)

The equation is now balanced:

Mg(s) + 2 HCl (aq) -> MgCl₂ (aq) + H₂(g)

c)

Oxidation state of Mg is changing from 0 to +2

So, it is oxidised

Oxidation state of H is changing from +1 to 0

So, it is reduced

Since both and oxidation is taking place, this is redox reaction

Answer: redox

Only 1 question at a time please