A 150 ml sample of water contains 1.2 mg of magnesium ion (Mg+2). What is the concentration of Mg+2 in ppm? If 18 g of NaOH dissolve in enough water to make 200 g of solution. Calculate the concentration in % m/m of NaOH solution NaOH+H2O= 200 g. It is necessary to prepare 500 g of a 15% m/m KOH solution. How many grams of KOH and H2O are needed?
A 150 ml sample of water contains 1.2 mg of magnesium ion (Mg+2). What is the concentration of Mg+2 in ppm? If 18 g of NaOH dissolve in enough water to make 200 g of solution. Calculate the concentration in % m/m of NaOH solution NaOH+H2O= 200 g. It is necessary to prepare 500 g of a 15% m/m KOH solution. How many grams of KOH and H2O are needed?
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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A 150 ml sample of water contains 1.2 mg of magnesium ion (Mg+2). What is the concentration of Mg+2 in ppm?
If 18 g of NaOH dissolve in enough water to make 200 g of solution. Calculate the concentration in % m/m of NaOH solution NaOH+H2O= 200 g.
It is necessary to prepare 500 g of a 15% m/m KOH solution. How many grams of KOH and H2O are needed?
Expert Solution
Step 1
a) Here given Mg+2=>1.2 mg
•Volume=>150 ml•So concentration will be= 1.2/150 mg/ml . =0.008 mg/ml
•Now 1mg/ml = 1000 ppm
•Concentration in ppm=0.008×1000
•Concentration in ppm=8 ppm
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