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5th Unit 4 Mixtures And Solutions Test Review
Test Description: Foss Kit 5th
Instructions: Answer all questions to get your test result.
1) Which of the following is a chemical reaction?
A
A rubber band breaks
B
Citric acid dissolves in water
C
A paper is cut
D
A bicycle rusts from being outside
2) Two cups have the same amount of water. Cup 1 has 30g of salt. Cup 2 has 44g of salt. How does the density and concentration Cup 1 compare to Cup 2?
A
Cup 1 is less dense but more concentrated than Cup 2.
B
Cup 1 is less dense and less concentrated than Cup 2.
C
Cup 1 is more dense but less concentrated than Cup 2.
D
Cup 1 is more dense and more concentrated than Cup 2.
3) To make a solution less concentrated, you should...
A
add more solute
B
add more solvent
4) A boy puts a marble in water and it sinks. This tells the boy that
A
The marble is more dense than the water.
B
The marble is less dense than the water.
C
The marble is glass.
D
The marble has less mass than the water.
5) It a solution is more concentrated than another, then it has a greater mass and weighs more.
A
True
B
False
6) Solution A has 8g of solid. Solution B has 10g of solid. Which solution is the least concentrated?
A
Solution A
B
Solution B
7) A salt water solution is 58g. After the water evaportes, what is the amount of salt left in the cup?
A
8g
B
50g
C
52g
D
58g
8) Solution 1 has 4 spoons of salt and 200 ml of water. Solution 2 has 2 spoons of salt and 100ml of water. Which would be more concentrated and heavier on a balance?
A
Solution 1
B
Solution 2
C
They both have the same concentration.
9) A solution that cannot dissolve any more solute and the solute sinks to the bottom is said to be
A
unsoluble
B
dissolved
C
solubility
D
saturated
10) A student mixes a colorless liquid and a blue solid. When all of the solid dissolves, the liquid is blue. After 10 minutes, a solid powder appears on the bottom of the cup. What is the evidence that a chemical reaction occurred?
A
The solution turned blue.
B
You can still see through the liquid.
C
The blue solid dissolved.
D
There is a solid powder at the bottom of the cup.
11) The original substances that are present before a chemical reaction are called
A
reactants
B
solvents
C
products
*select an answer for all questions
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