Question

1) K→KOH→K2SO4 2) Mg→MgCl2→Mg(OH)2→MgO

Answer 1

1)

2K + 2H₂O → 2KOH + H₂↑

2KOH + H₂SO₄ → K₂SO₄ + 2H₂O

2)

Mg + Cl₂ → MgCl₂

MgCl₂ + 2KOH → Mg(OH)₂↓ + 2KCl

Mg(OH)₂ --t°--> MgO + H₂O

Answer 2

It looks like you've provided two sequences of chemical reactions involving different elements. Let's break down each sequence:

1. K → KOH → K2SO4

This sequence represents the reaction of potassium (K) with other compounds:

• K reacts with water (H2O) to form potassium hydroxide (KOH).
• Potassium hydroxide (KOH) can react with sulfuric acid (H2SO4) to form potassium sulfate (K2SO4).

So, the overall reaction is: K + H2O → KOH KOH + H2SO4 → K2SO4

2. Mg → MgCl2 → Mg(OH)2 → MgO

This sequence represents the reaction of magnesium (Mg) with other compounds:

• Mg reacts with chlorine gas (Cl2) to form magnesium chloride (MgCl2).
• Magnesium chloride (MgCl2) can react with sodium hydroxide (NaOH) to form magnesium hydroxide (Mg(OH)2).
• Magnesium hydroxide (Mg(OH)2) can lose water to form magnesium oxide (MgO).

So, the overall reaction is: Mg + Cl2 → MgCl2 MgCl2 + 2NaOH → Mg(OH)2 + 2NaCl Mg(OH)2 → MgO + H2O

These sequences show the chemical reactions that occur when potassium (K) and magnesium (Mg) react with various substances to produce different compounds.