Question

part d: balancing equations (10 marks)

1. balance the following equations (10 marks)

a) k(s) + br₂ (l) → __ kbr (s)
b) al (s) + o₂ (g) → __ al₂o₃ (s)
c) bacl₂ (aq)+ na₂so₄ (aq)→ baso₄ (s)+ nacl (aq)

1. answer the following questions based on the balanced equation provided below for the reaction that occurs when zinc metal is added to hydrochloric acid.

d) hcl + ca(oh)₂→ cacl₂ + h₂o

Explanation:

Step1: Balance equation a

2K + Br₂ → 2KBr

Step2: Balance equation b

4Al + 3O₂ → 2Al₂O₃

Step3: Balance equation c

BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl

Step4: Balance equation d

2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O

Answer:

a) 2K + Br₂ → 2KBr
b) 4Al + 3O₂ → 2Al₂O₃
c) BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl
d) 2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O