Chemistry Concentrations Worksheet
Name __________________________________________________ Date __________ Period # _____
Chemistry Concentrations
Abbreviations: “Sol’n” = solution,”?” = What is the
I. Calculate molarity (moles/Liter) for 1-3. SHOW ALL WORK!
1] 57 g of NaClO3 in 300 mL of water
2] 288 g of Ag2Cr2O7 in 100 mL water
3] 852 g of Sn(C2H3O2)2 in 5.00 L water
4] How many grams of NaOH in 0.10 L water are needed to make a 3.0 M solution?
II. Calculate molality (moles of solute/kg of solvent).
5] 8.2 moles of ephedrine in 650 mL of isopropyl alcohol (density = 0.7855 g/mL)
6] 20.0 g of cane sugar, C12H22O11, dissolved in 175 grams of water.
7] A sol’n of alcohol (C2H5OH) in water is 1.25 molal. ? # grams of alcohol dissolved in 1.5 L H2O
8] A sol’n containing 66.0 g water & 44.0 g of glycerin, C3H5(OH)3
III. Calculate the # of moles of each substance in # 9.
9] 6.30g HNO3, 71.0g Na2SO4, & 98.1g H3PO4 in 0.192 L DMSO < 1.1014 g/mL; 106.2 g/m >
IV. Calculate using Henry’s Law.
10] ? new pressure of gas with a solubility of 24 g/ L if 48 g/L is soluble at 444 kPa.
11] ? solubility at 0.76 atm if gas is soluble at 3.0 g/ L at 3.8 atm.
V. Extra credit: Write out those calculations you can determine knowing the following.
12] 50 mL of 0.055 M HCl aqueous sol’n
13] 7.50 kg aqueous sol’n containing 120.0 g NaOH
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