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Zinc chloride calculation

Started by jiajia1987, Sep 27 2009 11:22 PM

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2 replies to this topic

#1 jiajia1987

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Posted 27 September 2009 - 11:22 PM

Hey peeps,

Sorry to have to bother you guys, but I'm always messing up at calculations so I thought it would be good for me to double confirm.

I want to make a solution of zinc chloride, and the bottle says it's 136.28g/mol.

Say.. I wanna make 250mM, so that means 0.25M.

So in ONE LITER, I am supposed to have 136.38g/mol X 0.25mole/L = 34.07g right?

If that is so... then in 50mL, I need 1.70g of zinc chloride!

Thanks in advance!!!!

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#2 Dr Teeth

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Posted 28 September 2009 - 04:18 AM

jiajia1987, on Sep 28 2009, 03:22 AM, said:

Hey peeps,

Sorry to have to bother you guys, but I'm always messing up at calculations so I thought it would be good for me to double confirm.

I want to make a solution of zinc chloride, and the bottle says it's 136.28g/mol.

Say.. I wanna make 250mM, so that means 0.25M.

So in ONE LITER, I am supposed to have 136.38g/mol X 0.25mole/L = 34.07g right?

If that is so... then in 50mL, I need 1.70g of zinc chloride!

Thanks in advance!!!!

Yes, that is correct.

Science is simply common sense at its best that is rigidly accurate in observation and merciless to fallacy in logic.
Thomas Henry Huxley