What type of reaction each one is, synthesis , decomposition , single displacement or double displacement?

a. zinc + copper (II) sulphate >>>> copper (II) + zinc sulphate

b. MG+ HCL >> H2 + MgCl2

a isn't the correct equation.

Zn + CuSO4 ==> Cu + ZnSO4 and it appears to me that Zn is replacing Cu(II) so that would be single replacement.

What's happening in b?

To determine the type of reaction for each equation, we need to analyze the elements and compounds present in the reactants and products. Here's how you can identify the type of reaction for each equation:

a. zinc + copper (II) sulphate >>>> copper (II) + zinc sulphate

In this equation, zinc (Zn) reacts with copper (II) sulphate (CuSO4) to form copper (Cu) and zinc sulphate (ZnSO4). Here's the breakdown of the reaction:

Zinc (Zn) + Copper (II) Sulphate (CuSO4) → Copper (Cu) + Zinc Sulphate (ZnSO4)

The reaction involves an element (zinc) reacting with a compound (copper sulfate) and resulting in the formation of two new compounds (copper and zinc sulfate). This type of reaction is known as a double displacement reaction because the positive and negative ions of the compounds switch places.

Therefore, the answer for equation (a) is: double displacement reaction.

b. Mg + HCl >> H2 + MgCl2

In this equation, magnesium (Mg) reacts with hydrochloric acid (HCl) to produce hydrogen gas (H2) and magnesium chloride (MgCl2). Here's the breakdown of the reaction:

Magnesium (Mg) + Hydrochloric Acid (HCl) → Hydrogen Gas (H2) + Magnesium Chloride (MgCl2)

The reaction involves an element (magnesium) reacting with an acid (hydrochloric acid) to produce hydrogen gas and a compound (magnesium chloride). This type of reaction is known as a single displacement reaction because one element displaces another element in a compound.

Therefore, the answer for equation (b) is: single displacement reaction.

By analyzing the reactants and products, you can determine the type of reaction for each equation.