The thermal decomposition of potassium chlorate can be used to produce oxygen in the laboratory. 2kclo3 (s) → 2kcl (s) + 3o2 (g) what volume (l) of o2 gas at 25 °c and 1.00 atm pressure is produced by the decomposition of 7.5 g of kclo3 (s)?

Answer : The volume of gas produced is 2.24 L

Explanation :

First we have to calculate the moles of .

Molar mass of = 122.55 g/mole

Now we have to calculate the moles of gas.

The balanced chemical reaction is:

From the reaction we conclude that,

As, 2 moles of decomposes to give 3 moles of

So, 0.06119 moles of decomposes to give moles of

Now we have to calculate the volume of gas.

Using ideal gas equation :

where,

P = Pressure of gas = 1.00 atm

V = Volume of gas = ?

n = number of moles   = 0.0918 mole

R = Gas constant =

T = Temperature of gas =

Putting values in above equation, we get:

Therefore, the volume of gas produced is 2.24 L

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