Vocab
(20s)What is the name given to a substances ability to dissolve in a solvent.
Solubility
(60s)How many moles of solute are present in 1.50 L of 0.240 M Na2SO4
mm=119.05 g/mol
0.360 moles
(molar mass is unnecessary in this problem)
(20s)You dilute a solution by adding water. Does the number of moles of solute increase, decrease, or remain the same?
Remains the same
(30s)15 g KClO3 is added to 100. g water at 50oC. Is this solution saturated or unsaturated?
Unsaturated
(30s)You start with 10.0 L of a 5.0 M solution. You add water until the final volume is 50.0 L. What is the new concentration?
(Triple points to the first team in correctly)
1.0 M
(20s)What is the number of moles of a solute dissolved per liter of solution
Molarity
(60s)A Saline solution contains .90 g NaCl in 100. mL of solution, what is the molarity of the solution?
mm=58.44 g/mol
0.15M
(20s)You add water to a solution. Does the concentration increase, decrease, or remain the same?
Decrease
(30s)You wish to make a saturated solution of KNO3 at 70oC. What mass of KNO3 should you add to 100. g of water?
https://www.ontrack-media.net/chemistry/cm5l5image4.jpg
First team in correctly earns triple points
~130 g
(40s)You want to make 1.2 L of a 2.0 M solution. What volume of the 6.0 M solution must you use to dilute?
0.40 L
(20s)A solution has a small amount of solute dissolved but more CAN dissolve. The solution is said to be _________
Unsaturated
(60s)You dissolve 30.0 g NaCl in 1.50 L water. What is the molarity of this solution?
First team correct gets triple points!
mm=58.44 g/mol
0.342 M
(20s)You evaporate a solution. Does the concentration increase, decrease, or remain the same?
Increase
(30s)90. g NH3 is added to 100. g H2O at 10oC. What mass of NH3 is undissolved?
~20 g
(60s)You add 300. mL of water to 200. mL of a 10.0 M solution. What is the molarity of the final solution?
4.00 M
(20s)What is the name given to the substance that gets dissolved in a solution?
Solute
(60s)What mass of CaCl2 is needed to make 250. mL of 2.0M solution
mm=110.98 g/mol
55 g
The molarity of a 6.0 L solution increases by 3x by evaporating water. How much water is left in the solution?
2.0 L
(If molarity increases by 3x, the volume decreases by 3x)
(30s)A saturated solution of KClO3 is made in 100. g water at 80oC. The solution is then cooled to 30oC. What mass of KClO3 precipitated out?
~30 g
(60s)How many milliliters of a solution of 2.00M MgSO4 would you need to prepare 120. mL of .400M MgSO4
24.0 mL (watch sig figs!)
(20s)What is the equation for dilution of a solution?
M1V1=M2V2
(60s)How many mL of 1.25 M solution can be made using 8.0 g NH4NO3?
mm=80.06 g/mol
80. mL
(20s)As you increase the independent variable, the dependent variable also increase. This is known as a ________ relationship.
Direct
Make sure you know that as one variable increases, the other decreases is known as inverse.
(60s)How much water must be added to 50.0 mL of 4.00M KI to make 1.00 M KI?
150. mL or 0.150 L water added
(Needs to have a final volume of 200. mL)