How many grams of sodium chloride are needed to make 17.5g of sodium?

Question

asked Feb 8, 2021 82.9k views

1 Answer

Kouga · Answer 1 · 2021-02-12T00:07:21+0000

Answer : The mass of
NaCl needed are, 44.5 grams.

Explanation :

First we have to calculate the moles of Na.

$\text{Moles of }Na=\frac{\text{Given mass }Na}{\text{Molar mass }Na}=(17.5g)/(23g/mol)=0.761mol$

Now we have to calculate the moles of NaCl.

The balanced chemical reaction is:

$2NaCl\rightarrow 2Na+Cl_2$

From the reaction, we conclude that

As, 2 mole of
produces from 2 mole of
NaCl

So, 0.761 mole of
produces from 0.761 mole of
NaCl

Now we have to calculate the mass of
NaCl

$\text{ Mass of }NaCl=\text{ Moles of }NaCl* \text{ Molar mass of }NaCl$

Molar mass of
NaCl = 58.5 g/mole

$\text{ Mass of }NaCl=(0.761moles)* (58.5g/mole)=44.5g$

Therefore, the mass of
NaCl needed are, 44.5 grams.