Question

Distinguish between zinc carbonate and lead carbonate (dry heating)

Answer 1

To know the amount or volume of NaOH to prepare 400 mL of 1.5 M NaOH, we use formula

M1 X V1 = M2 X V2

V1 = M2 X V2/ M1

But before that we will convert 400 mL into litre = 0.4 L

5.5 X V1 = 1.5 M x 0.4 L

V1 = 1.5 M X 0.4L/ 5.5

V1= 0.10 L

V1 = 100mL

So, you need 100mL of 5.5 NaOH

Answer 2

Answer:

WHEN ZINC CARBONATE IS HEATED IT FORMS A SUBSTANCE YELLOW WHEN HOT AND WHITE WHEN COLD WHICH IS ZINC OXIDE. WHEN LEAD IS HEATED IT FORMS YELLOW BUFF WHICH IS LEAD OXIDE. Zinc carbonate=》Forms White colour .