24/25 Mixtures and Solutions Review

Cup A contains a solution made by mixing two spoons of solid in 100 mL of water. Which solution listed below must be in cup B?

• 3 spoons of solid, 600mL of water
• 5 spoons of solid, 250mL of water
• 8 spoons of solid, 400mL of water
• 6 spoons of solid, 300mL of water

Tags

NGSS.MS-PS1-2

The girl uses a paper filter to separate the floating solid from the liquid. Why does the solid stay in the filter and the liquid go through the filter?

A student mixes a colorless liquid and a pink solid. When all of the solid dissolves, the solution is pink. Ten minutes later,  a pale solid settles on the bottom of the cup.

What is the best evidence that a chemical reaction occurred?

• The solution turned pink.
• The pink solid dissolved.
• The solid that sits on the bottom of the cup.
• You could still see through the liquid.

Tags

NGSS.MS-PS1-2

A student adds three spoons of solid to 250 milliliters of water. The solution is clear, with nothing on the bottom of the cup. One spoon of the solid has a mass of 10g.

What is the mass of the solution?

• 250 g

• 100 g

• 200 g

• 260 g

Tags

NGSS.MS-PS1-5

A student adds three spoons of solid to 250 milliliters of water. The solution is clear, with nothing on the bottom of the cup. One spoon of the solid has a mass of 10g.

After the water evaporates, what is the mass of the solid remaining in the cup?

• 10 g

• 20 g

• 30 g

• 260 g

Tags

NGSS.MS-PS1-5

Water + Baking Soda + Calcium Chloride --> Water + Calcium Carbonate

What were the reactants in our chemical reaction?

(a)  

Tags

NGSS.MS-PS1-2

Water + Baking Soda + Calcium Chloride --> Water + Calcium Carbonate

What was the product of this chemical reaction?

(a)  

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What can be made from calcium carbonate?

• Paper
• Pencils
• Chalk
• Baking Soda

Two students were making chocolate lollipops to hand out at the class party at the end of the year. They melted a chocolate bar that was 1000 grams.

The melted chocolate weighed ________________ as the chocolate bar.

• More
• Less
• The Same

Tags

NGSS.MS-PS1-5

Two students were making chocolate lollipops to hand out at the class party at the end of the year. They melted a chocolate bar that was 1000 grams.

After the chocolate hardened into lollipops (and every bit of chocolate was used to make the lollipops), the total weight of the chocolate in all of the lollipops was __________ as the original chocolate.

• More
• Less
• The same

Tags

NGSS.MS-PS1-5