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WorksheetsSPINK CHEMISTRY Ch. 15 Solutions
Total questions: 11
Worksheet time: 22mins
Calculate the percent by mass of 3.55 grams of sodium chloride dissolved in 88 grams of water.
4.0%
3.9%
25%
26%
If you prepared a saturated aqueous solution of potassium chloride at 25oC and then heated it to 50oC, how could you now describe the solution?
saturated
unsaturated
supersaturated
none of these
Which of the following substances will NOT be soluble in a polar alcohol solvent?
sugar
NaCl
Petroleum
Only sugar and NaCl
How many grams of calcium nitrate (Ca(NO3)2) would you need to prepare 3.00 L of a 0.500 M solution? (molar mass of Ca(NO3)2 is 164.1 g/mol)
246 g
1.5 g
164.1 g/mol
6 g
50 grams of KNO3 in a 10oC solution could be described as
saturated
unsaturated
supersaturated
none of the above
The amount of solute needed to make a saturated solution of CaCl2 in 50 g of water at 20oC is
76
38
20
55
Which of the following substances is probably a gas at normal temperatures?
PbNO3
CaCl2
KCl
NH3
Which of the following substances shows an inverse relationship between solubility and temperature?
NH3
K2Cr2O7
None of these
Explain why water is able to dissolve ionic substances?
There are two hydrogen atoms for every one oxygen atom
Water molecules are polar
Hydrogen and Oxygen are covalently bonded
Oxygen has six electrons in its outermost energy level
What is the molarity of a solution containing 35.0 g of NaOH in enough water to form 5.00 x 102 cm3 of solution? (molar mass of NaOH is 40 g/mol)
14.3 M
.07 M
1.75 M
.00175 M
How many grams of K2SO4 would be needed to prepare 3.00 L of a 0.0710 M solution?
.213 grams
174 grams
37.1 grams
.001 grams
