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3 years ago

Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi

Chemistry

1 answer:

AlladinOne [14]3 years ago

6 0

Answer:

Bài 1. Có 30g dung dịch NaCl 20%. Tính nồng độ % dung dịch thu được khi

a. Pha thêm 20g H2O

b. Cô đặc dung dịch để chỉ còn 25g.

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For H = $\frac{0.278}{0.104}=3$

For O = $\frac{0.104}{0.104}=1$

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