Question

How many mL of 6.0 M HCl solution will provide 164 g of HCl?

Answer 1

Answer:

0.75 L

Explanation:

The idea here is that you need to determine how many moles you get in 164 g of hydrochloric acid, then use the given solution's molarity to figure out the volume that would contain that many moles.

So, hydrochloric acid has a molar mass of 36.46 g/mol, which means that the 164-gsample will contain

164g⋅1 mole HCl36.46g=4.498 moles HCl

As you know, molarity is defined as moles of solute, which in this case is hydrochloric acid, divided by liters of solution

molarity=moles of soluteliters of solution

A 6.0-M hydrochloric acid solution will contain 6moles of hydrochloric acid for every liter of solution. This means that 4.498 moles will come with a volume of

c=nV⇒V=nc

V=4.498moles6.0molesL=0.7497 L

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