Basics
If 2.0 ml of 6.0 M is used to make a 500.0 ml solution, what is the concentration of the dilute solution.
0.024 M
How many grams of Ca(OH)2 are needed to make 100.0 mL of 0.250 M solution?
1.85g
H3PO4 + 3 NaOH --> Na3PO4 + 3 H2O
How much 0.20 M H3PO4 is needed to react with 100 ml. of 0.10 M NaOH?
17 ml
Calculate the boiling point of a solution made from 227g of MgCl2 dissolved in 700.0g of water.
Kb of water= 0.512 C/m
105.25 degrees C
Gold has a specific heat of 0.129 J/(g×°C). How many joules of heat energy are required to raise the temperature of 15 grams of gold from 22 °C to 85 °C?
q = 121.9 J
How many ml of a 2.0 M NaBr solution would be diluted to make 200.0 ml of 0.50 M NaBr?
50.0 ml
What is the molarity of a solution made by dissolving 20.0 g of H3PO4 in 50.0 mL of solution?
4.08M
CaCO3 + 2 HCl --> CaCl2 + H2O + CO2
How much 0.80 M HCl would be needed to dissolve a CaCO3 pearl which weighs 4.0 grams?
0.100L
What is the freezing point depression when 309 g of isoprene (C5H8) is dissolved in 747 g of ethyl ether? The freezing point constant for ethyl ether is 1.79 °C/m.
10.87 °C
If the temperature of 34.4 g of ethanol increases from 25 °C to 78.8 °C, how much heat has been absorbed by the ethanol? The specific heat of ethanol is 2.44 J/(g×°C)
q = 4532.544 J
You need to make 10.0 L of 1.2 M KNO3. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it?
4.80M
What volume (in mL) of 18.0 M H2SO4 is needed to contain 2.45 g H2SO4?
0.0013878 L
How many grams of aluminum are required to react with 55.0 ml of 2.0 M hydrochloric acid?
___HCl + __ Al --> __ Al Cl3 + H2
0.989 g
What is the freezing point depression when 62.2 g of toluene (C7H8) is dissolved in 481 g of naphthalene? The freezing point constant for naphthalene is 7.00 °C/m.
9.82 °C
Graphite has a specific heat of 0.709 J/(g×°C). If a 25 gram piece of graphite is cooled from 35 °C to 18 °C, how much energy was lost by the graphite?
q = --301.325 J
If you dilute 175 mL of a 1.6 M solution of LiCl to 1.0 L, determine the new concentration of the solution.
0.28M
What weight (in grams) of H2SO4 would be needed to make 750.0 mL of 2.00 M solution?
147.1152 g
How many grams of sodium can be reacted with 550 ml of a 18.0M solution of sulfuric acid?
__ Na + __ H2SO4 --> __Na2SO4 + ___H2
455g
What is the boiling point elevation when 147 g of lactic acid (C6H10O5) is dissolved in 647 g of cyclohexane (C6H12)? The boiling point constant for cyclohexane is 2.79 °C/m.
3.91 °C
Copper has a specific heat of 0.385 J/(g×°C). A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100 °C to 200 °C. What is the mass of the piece of copper?
m= 129.87 g
You need to make 10.0 L of 1.2 M KNO3. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it?
4.80M
What mass of Na2SO4 is needed to make 2.5 L of a 2.0M solution?
710.0g
How many liters of a 1.25M solution of Ca(NO3)2 will be required to react with 225g of Na2CO3?
1.70 L
What is the boiling point of a solution prepared by adding 29.3 g of methol (C10H20O) to 0.0590 kg of chloroform? The boiling point of pure chloroform is 61.2 °C. The boiling point constant for chloroform is 3.85 °C/m
73.4 °C
A 40 g sample of water absorbs 500 Joules of energy. How much did the water temperature change? The specific heat of water is 4.18 J/(g×°C).
Change in temperature == 2.99 °C