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Answer to Question #57222 in Other Chemistry for panos

Question #57222
A student analyzes a sample and finds out it contains 25% of NaCl. After that he realises the sample contained KCl instead of NaCl. What is the % concentration of KCl in the sample?
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Comments

Assignment Expert
18.01.16, 19:47

Here number of moles is not considered. The ratio of the mass percents is the same as the ratio of molecular weights of two substances.

panos
17.01.16, 22:58

can you explain how the first equation came up? The number of moles in the sample is stable?

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