How many milliliters of water are needed to make a 0.171 M solution that contains 1.00 g of NaCl?

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Answer 1 · 2017-05-14T02:57:49

$100. mL$

You will be using the basic molarity equation, but first, we must convert the grams of $NaCl$ to moles:

$1.00g NaCl((1 mol NaCl)/(58.44 g NaCl)) = 0.0171 mol NaCl$

Now, we'll use the molarity equation

$M = (mol solute)/(L soln)$

and solve for volume ( $L$ ):

$L soln = (mol solute)/(M)$

and plug in known variables to find the volume

$L soln = (0.0171 mol)/(0.171(mol)/L) = 0.100 L$

Lastly, we'll convert from liters to milliliters:

$(0.100 L)(1000 mL)/(1 L) = 100. mL$