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/sci/ - Science & Math

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5410709 No.5410709[DELETED]  [Reply] [Original]

Shouldn't be aproblem for anyone good in chemistry. Could you please tell me the solution to this and how to calculate it:

How much of KH2PO4 you need to dilute in distilled water to get a 100 ml solution with phosphor concentration of 2 mgP/l

>> No.5410721

>>5410709

www.lenntech.com/calculators/molecular/molecular-weight-calculator.htm

enter the molecule there, find out how much of it is made up of P (weight wise) and then calculate rest.

seriously?

>> No.5410885

>>5410721
That's not right.

>> No.5410898

>>5410885
If you're too lazy/retarded to do any work at all we aren't going to help you with basic high school shit, fuck off.

>> No.5410922

>>5410898
nice, guy

>> No.5410936

m/M = g

or more simply : 30.9737961g per mol of P is inside one molecule you posted in the OP.

since you need 2g of P in 100ml you want 1/15 of that molecular mass, which is 0.0666667.

i hope youre in highschool