A sample of sodium bicarbonate is known to contain some impurities. It is found that Na makes up 18.00% of the entire mass of the sample. All of the Na comes from the NaHCO3 com…

Question

asked Apr 25, 2020 129k views

1 Answer

Octav · Answer 1 · 2020-04-29T21:28:58+0000

Answer : The mass percent of
in the sample is, 65.7 %

Explanation :

As we are given that Na makes up 18.00% of the entire mass of the sample.

First we have to calculate the mass percent of Na in
.

$\text{Mass percent of Na}=\frac{\text{Mass of Na}}{\text{Mass of }NaHCO_3}* 100$

Mass of Na = 23 g

Mass of
NaHCO_3 = 84 g

Putting values in above equation, we get:

$\text{Mass percent of Na}=(23g)/(84g)* 100=27.4\%$

Now we have to calculate the mass percent of
in the sample.

As, 27.4 % amount of Na present in 100 %
NaHCO_3

So, 18 % amount of Na present in
$(18)/(27.4)* 100\%=65.7\%$
NaHCO_3

Therefore, the mass percent of
in the sample is, 65.7 %