5th Unit 4 Mixtures And Solutions Test Review Question Preview (ID: 41825)


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A solution that cannot dissolve any more solute and the solute sinks to the bottom is said to be
a) solubility
b) dissolved
c) saturated
d) unsoluble

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) The blue solid dissolved.
c) There is a solid powder at the bottom of the cup.
d) You can still see through the liquid.

A salt water solution is 58g. After the water evaportes, what is the amount of salt left in the cup?
a) 50g
b) 8g
c) 58g
d) 52g

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.
d)

Solution A has 8g of solid. Solution B has 10g of solid. Which solution is the least concentrated?
a) Solution A
b) Solution B
c)
d)

It a solution is more concentrated than another, then it has a greater mass and weighs more.
a) True
b) False
c)
d)

A boy puts a marble in water and it sinks. This tells the boy that
a) The marble is glass.
b) The marble has less mass than the water.
c) The marble is less dense than the water.
d) The marble is more dense than the water.

To make a solution less concentrated, you should...
a) add more solute
b) add more solvent
c)
d)

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 more dense and more concentrated than Cup 2.
b) Cup 1 is more dense but less concentrated than Cup 2.
c) Cup 1 is less dense and less concentrated than Cup 2.
d) Cup 1 is less dense but more concentrated than Cup 2.

Which of the following is a chemical reaction?
a) A bicycle rusts from being outside
b) Citric acid dissolves in water
c) A rubber band breaks
d) A paper is cut

The original substances that are present before a chemical reaction are called
a) reactants
b) products
c) solvents
d)

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