WorksheetsMastery Check Review - Unit Solutions, Acids, and Bases
Total questions: 16
Worksheet time: 16mins
If more salt was added to an unsaturated saltwater solution, how will the concentration of the solution change?
The concentration of the solution will decrease because the salt was added; this resulted in a smaller volume of solution.
The concentration will first increase then decrease because both the salt and the water evaporated; first, only the water evaporates, but later, the salt also begins to evaporate.
The concentration of the solution will increase because the salt was added; this resulted in a solution with the larger amount of salt but a same volume of water.
The concentration of the solution stays the same because the salt evaporated with the water; this resulted in a solution with the same mass of solute per unit volume of solvent.
DeYon prepares two solutions and illustrates them, as shown below. The dots represent solute particles.
DeYon wants to test the conductivity of each solution. Prior to carrying out the investigation, he needs to identify the variables being controlled and the variables being changed between the two solutions. Which identification of the variables is correct?
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
The volume of the solution and the number of solute particles are being changed between the two solutions, but the concentration of the solution is being held constant.
The number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.
The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.
Dr. Gyorgyi is investigating which type of medicine delivery system, a solid pill or a scoop of powder, would relieve pain faster. Which hypothesis should Dr. Gyorgyi develop given prior knowledge about surface area?
Powders have more surface area and will dissolve in the bloodstream faster
Powders have less surface area and will dissolve in the bloodstream faster
Tablets have more surface area and will take longer to dissolve into the bloodstream
Tablets have less surface area and will enter the bloodstream without dissolving
Where should you keep your glass of soda if you want it to remain fizzy?
On the counter so that the warmer temperature can allow the gas to remain dissolved within the liquid of the soda more easily.
On the counter so that the warmer temperature can allow the liquid of the soda to remain dissolved within the gas more easily.
In the refrigerator so that the colder temperature can allow the gas to remain dissolved within the liquid of the soda more easily.
In the refrigerator so that the colder temperature can allow the liquid of the soda to remain dissolved within the gas more easily.
Felix is helping his mom make sweet tea. She wants the tea to be very sweet and very strong. Felix knows how to alter solutes so that they will dissolve better and faster.
Which of the following conditions would help make the sweet tea faster?
1. using sugar cubes
2. using granulated sugar
3. using hot water
4. using cold water
5. allowing to sit
6. stirring vigorously
1, 2, 5
2, 3, 5
2, 3, 6
1, 4, 5
What is the solubility of KNO3 in 100g of water at 60℃?
28 grams / 100g of H2O
38 grams /100g of H2O
45 grams/100g of H2O
108 grams/100g H2O
How much sodium nitrate, NaNO3, would completely dissolve in 100g of water at 60℃?
0 g
44 g
108 g
126 g
Based on the solubility curve of carbon dioxide, which statement would not be accurate about soda?
Cold soda will taste more bubbly because the solubility of carbon dioxide in water is higher at higher temperatures.
Cold soda will taste less bubbly, because the solubility of carbon dioxide in water is lower at lower temperatures.
Warm soda will taste more bubbly, because the solubility of carbon dioxide in water is higher at higher temperatures
Warm soda will taste less bubbly, because the solubility of carbon dioxide is lower at higher temperatures.
Ammonia (NH3) dissolved in water is heated in a beaker. Initially there 60 grams were dissolved in 100 grams of water.
What would happen if the temperature reached 90℃ and why?
about 50 more grams of ammonia would be able to dissolve as the increase in temperature caused the solubility to decrease.
about 50 grams of ammonia would come out of solution as the increase in temperature caused the solubility to increase.
about 50 more grams of ammonia would be able to dissolve as the increase in temperature caused the solubility to increase.
about 50 grams of ammonia would come out of solution as the increase in temperature caused the solubility to decrease.
According to the data what kind of substance is bile?
It is a weak acid since the red litmus paper turns blue and the pH is 8.2
It is a strong acid since the red litmus paper turns blue and the pH is 8.2
It is a weak base since the red litmus paper turns blue and the pH is 8.2
It is a strong base since the red litmus paper turns blue and the pH is 8.2
Students were given four unknown solutions and asked to categorize them as acidic, basic, or neutral. The students tested each solution for conductivity and performed a litmus paper test as shown in the data table.
Which statement below would be the best explanation for how students should categorize the solutions?
Solutions W and Y must be acids since they both conduct electricity very well. Solution X is neutral since it does not conduct electricity. Solution Z is a base since it is a weak conductor of electricity.
Solutions W and Y are very strong solutions since both conduct electricity well. Solution W is a strong base since litmus paper turned blue. Solution X is neutral since litmus paper didn’t change. Solutions Y and Z are acids since litmus paper turned red.
Solutions W and Y are very strong solutions since both conduct electricity well. Solution W is a strong acid since litmus paper turned blue. Solution X is neutral since litmus paper didn’t change. Solutions Y and Z are bases since litmus paper turned red.
Solution W is a strong base since is conducts electricity well and turned litmus paper blue. Solutions X and Z are neutral since they don’t conduct electricity well or at all. Solution Y is a strong acid since it conducts electricity well and turned litmus paper red.
Chloe wants to classify household chemicals by testing them using litmus paper. If she is going to classify these chemicals correctly, which statement will best help her determine if the chemicals are acids or bases?
if blue litmus paper turns red, the substance has a pH below 7 and is a base
if blue litmus paper turns red, the substance has a pH above 7 and is a base
if blue litmus paper turns red, the substance has a pH below 7 and is an acid
if blue litmus paper turns red, the substance has a pH above 7 and is an acid
Please click on the image to see the question.
She should mix substance A, lemon juice, with substance C, ammonia. She should mix substance B, milk of magnesia, with substance D, black coffee.
She should mix substance C, lemon juice, with substance A, ammonia. She should mix substance D, Milk of Magnesia, with substance B, black coffee.
She should mix substance A, lemon juice, with substance B, Milk of Magnesia. She should mix substance C, ammonia, with substance D, black coffee.
She should mix substance C, ammonia, with substance B, Milk of Magnesia. She should mix substance D, black coffee, with substance A, lemon juice.
Why is pure salt water a conductor of electricity?
Salt water has many free ions.
Salt water has no free ions.
Salt water has many dissolved impurities.
Salt water has few dissolved impurities.
What is the factor that affects the rate of dissolving by increasing the exposed parts of the solute?
surface area
temperature
agitation
concentration
Litmus paper and red cabbage are substances that change color when they come in contact with an acid or a base. What are litmus paper and red cabbage an example of?
indicators
electrolytes
insulators
solvents
