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At 25degree C, a saturated solution of carbon dioxide gas in water has a concentration of 0.145% (m/v). What mass of carbon dioxide is present in 250mL of the solution?

Sagot :

Jeremiaidn
Given:
          Volume of solution = 250 ml
           Concentration of carbon dioxide = 0.145%
Asked: mass of carbon dioxide
Solution:

Percent by mass/ volume = [tex] \frac{mass-of- solute}{volume-of-solution} [/tex]
0.145% g/ml = [tex] \frac{mass-of-carbon-dioxide}{250 ml} [/tex]
(0.00145 g/ml) (250 ml) = mass of carbon dioxide
0.3625 g = mass of carbon dioxide