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화학/용액의 농도

iodine mass % 5.0×10^(-8) % 7.4 g iodine kg sea water

by 영원파란 2022. 11. 1.

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iodine mass % 5.0×10^(-8) % 7.4 g iodine kg sea water

 

 

The abundance of iodine in seawater is 5.0×10^(-8) % by mass.

How many kilograms of seawater must be treated to obtain 7.4 g iodine?

 

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용액 질량 = 용질 질량 / (%농도/100)

( 참고 https://ywpop.tistory.com/9293 )

 

= 7.5 g / (5.0×10^(-8) / 100)

= 1.5×10^10 g 바닷물

 

 

 

(1.5×10^10 g) (1 kg / 1000 g) = 1.5×10^7 kg

 

 

 

답: 1.5×10^7 kg

 

 

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