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Topic: Basic Concentration Calculation  (Read 1953 times)

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Offline pk333

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Basic Concentration Calculation
« on: January 25, 2016, 01:07:50 PM »
how many mg of x to weigh out to make 10 mL of 0.25% solution. 1% w/v = 1g/100 ml. Please explain thanks I struggle with these proportion ones.
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Offline mikasaur

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Re: Basic Concentration Calculation
« Reply #1 on: January 25, 2016, 01:17:16 PM »
Hello and welcome to the forums. Before we can help you you must show an attempt at the problem. It's one of the rules you can read about here.

What sort of a problem do you think this is? What equations do you know that can relate mass, volumes, and concentrations?
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Or you could, you know, Google it.

Offline pk333

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Re: Basic Concentration Calculation
« Reply #2 on: January 25, 2016, 01:26:02 PM »
Quote from: mikasaur on January 25, 2016, 01:17:16 PM
Hello and welcome to the forums. Before we can help you you must show an attempt at the problem. It's one of the rules you can read about here.

What sort of a problem do you think this is? What equations do you know that can relate mass, volumes, and concentrations?

Is it simply 0.025 grams?

1% solution = 1g/100ml
0.25% solution = 0.25g/100ml= 0.025g/10ml

Sorry I hate these types of problems haha.
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Offline mikasaur

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Re: Basic Concentration Calculation
« Reply #3 on: January 25, 2016, 01:28:15 PM »
Seems right to me.
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