Question

Moles of KClO3 required for producing sufficient O2 to react with 0.1 mole of aluminium will be (molar mass of KClO3 = 122.5) (1)0.2 mole (2)0.1 mole (3) 0.05 mole (4) 0.15 mole​

Answer 1

Answer:

0.05 moles

Explanation:

Aluminium reacts with KClO3 to form aluminium oxide and potassium chloride as per the equation below

This is known as redox reaction because potassium chlorate is reduced that is it looses it oxygen whereas aluminium is oxidised

We first write a balanced chemical equation

KClO3 + 2Al –> Al2O3 + KCl

The number of moles of aluminium that react is 0.1 moles

Aluminium and potassium chlorate react in the ratio 2:1

Therefore we say

If 2.  =     0.1

1        =     ?

We cross multiply

0.1 × 1 ÷ 2 =  0.05 moles

Answer 2

Explanation:

0.05 moles

hope you GET it