Miscellaneous Problems I
How many mL of a 80.20% ethanol stock solution would be need to make 345.0 mL of a 18.4% (v/v) ethanol solution?
79.2 mL
The solubility of a gas in water is 1.6g/L at 1.0 atm. What is the solubility of the same gas at 2.5 atm.
4.0 g/L
LiNO2 * 7 H2O
lithium nitrite heptahydrate
heterogeneous mixture containing particles intermediate in size between a suspension and a solution
colloid
What is the molar mass of barium phosphate monohydrate
Ba3PO4 * H2O : 524.9 g/mol
What mass (in g) of water should be added to 1.50 g sodium nitrate to prepare a 0.100 m solution?
176 g H2O
What is the molarity of a solution when 952 g of ammonium carbonate are dissolved to make a 1750mL solution?
5.67 M (NH4)2CO3
Titanium (III) chromate * hexahydrate
Ti2(CrO4)3 * 6 H2O
Any substance that interferes with the hydrogen bonding between water molecules and thereby reduces surface tension
surfactant
What is the percent water in titanium I chromate pentahydrate
Ti2CrO4 * 5H2O : 301.8 g/mol => 29.8%
What is the freezing point of a solution in which 3.5g of sodium chloride is added to 230 mL H20?
-0.97 C
If you had to make 250.0 mL of a 50.0 mM aqueous solution of lead (IV) chromate, how many grams of lead (IV) chromate would you need?
5.49 g Pb(CrO4)2
Sn(SO4)2 * 2 H2O
tin (IV) sulfate dihydrate
miscible
description of two liquids that dissolve in each other
A 7.98 g sample of manganese III sulfide trihydrate is heated to remove all water. How much does the remaining salt weigh.
Mn2S3 * 3 H2O : 260.1 g/mol => 79.24% salt => 6.32g remain
The molality of an aqueous solution of sugar (C12H22O11) is 1.62 m . Calculate the mole fractions of sugar and water.
Xsugar = 0.0283
Xwater = 0.972
If a stock solution of 1.00 M NaCl is available. How many mL are needed to make 100.0 mL of 0.750 M?
75.0 mL
titanium (IV) sulfide heptahydrate
TiS2 * 7 H2O
solvation
The process by which the positive and negative ions of an ionic solid become surrounded by solvent molecules
A 16.4 g sample of hydrated calcium sulfate is heated until all the water is driven off. The calcium sulfate that remains has a mass of 13.0g. Find the formula and the chemical name of the hydrate.
CaSO4 * 2H2O calcium sulfate dihydrate
If 60.5 mL of nitric acid are required to react with 25.0 mL of a 1.00 M barium hydroxide solution to form water and barium nitrate. What is the molarity of the nitric acid solution?
O.826 M HNO3
How many grams of copper IV sulfate would be needed to make 350 mL of a 6.95% (m/v) solution?
24.3 g Cu(SO4)2
Copper (IV) phosphate pentahydrate
Cu3(PO4)4 * 5 H2O
scattering of visible light by colloidal particles
Tyndall effect
A hydrate is 24.45% titanium, 38.80% Fluorine, and 36.75% water. What is the name and formula of the hydrate?
Titanium (IV) fluoride tetrahydrate : TiF4 * 4 H2O