Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Babygal on November 14, 2011, 04:37:51 AM
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May some1 please give an idea of what 2 convert or work out these questions.
Interconverstion of volume, concentrations and mass, give the answers in milligrams
3. What mass of potassium chloride is in 0.219 ml of 140 mM solution?
Diluting solutions
4. It is required to make a 0.029 M solution of sulphuric acid from 70.4 ml of a stock solution whose concentration is 0.083 M. What volume of water would you need to add? [units ml]
5. 40.6 ml of water is added to 63.6 ml of 0.618 M formic acid. What will be the concentration of the resulting solution?[units mol Lˉ¹]
6. What volume of 0.342 M solution of potassium chloride would you add to 4 L of water to produce a solution of concentration 0.286 M?[units ml]
7. Using a 20 ml volumetric flask, you are required to make a 0.024 M solution of ammonia from a stock solution whose concentration is 0.055 M. What volume of ammonia would you need to add to the flask[units ml]
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I don't know what timezone you're in but I'll try help you out before your deadline.
Edit: answers deleted.
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Giving final answers is against forum rules (http://www.chemicalforums.com/index.php?topic=33740.0). Topic locked.
Be warned.