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Question

4 g equimolar mixture of NaOH and Na2CO3 contains x g of NaOH and y g of Na2CO3.The value of x to the nearest integer (in g) is

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Solution

Total mass=4g
Now,
moles ofNaOH=moles ofNa2CO3=aWNaOH+WNa2CO3=4 g
40a+106a=4
40a+106a=4
a=4146mol
mass of NaOH =4146×40 g=1.095 g1 g

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