A solution of Potassium nitrate has a concentration of #0.2# #"mol dm"^-3#. Calculate how many moles of potassium nitrate are dissolved in #10# #"cm"^3# of the solution?

1 Answer
Monzur R.
Apr 1, 2018

Moles of potassium nitrate #= 0.002# #"mol"#

Explanation:

To work out the no. of moles of a liquid, we have a formula

#n=cv#

where #n# is the number of moles and #cv# is the is the concentration in #"mol dm^-3"# multiplied by the volume in #"dm"^-3#

Here the concentration is given and the volume is #0.01# #"dm"^3#

So,

Number of moles of Potassium nitrate #=0.01×0.2=0.002# #"mol"#

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