Liquids in Liquids
What is a mixture of two liquids called?
A solution or a homogeneous mixture.
What is a common example of a solid dissolved in a liquid?
Salt in water or sugar in water. Answers may vary
What is a solution?
A homogeneous mixture of two or more substances where one substance dissolves in another.
What is a mixture?
Any combination of two or more substances where each retains its own properties.
What is the Law of Conservation of Matter?
Matter cannot be created or destroyed in a chemical reaction; it is conserved.
Name a beverage that is an example of liquids mixed
Water and oil. Answers may vary.
Name a drink where sugar is dissolved in water.
Lemonade. Answers may vary.
Give an example of three solutions
Salt solution, sugar solution, vinegar in water
If I added rocks to a glass of water, do I have a mixture? Explain.
Yes, it's a mixture because the rocks and water maintain their physical properties.
How does the conservation of matter apply in a kitchen setting?
When cooking or baking, the mass of ingredients combined equals the mass of the finished product.
Can liquids and liquids be a mixture?
Yes, they can form a homogeneous mixture if miscible.
How does stirring affect the rate of a solid dissolving in a liquid?
Stirring increases the rate of dissolution by moving more solute into contact with the solvent.
What does the prefix “sol” mean?
"Sol" refers to a substance that is dissolved, leading to a solution.
Find three examples of mixtures in your classroom.
Answers may vary. Examples could include air, saltwater, chalk and water.
If you were placing 15 grams of salt into a glass of water that weighed 50 grams, how much would the solution weight.
65 grams
What would be easier to separate: a mixture of rocks and water or a mixture of water and oil? Explain why.
A mixture of rocks and water would be easier to separate because you can physically remove the rocks.
How do we know that solids and liquids can create a mixture?
We know because the solids can be dispersed in the liquid and can be separated by physical means without changing their chemical properties
What is the difference between a mixture and solution?
A solution is a homogeneous mixture where one substance dissolves in another; a mixture can be homogeneous or heterogeneous.
Explain why a solution is a mixture but not all mixtures are solutions
A solution is a homogeneous mixture where the solute completely dissolves, unlike some mixtures where components remain distinct.
A scientist is about to add 25 grams of salt to a glass of water weighing 72 grams. As she is pouring the salt in 5 grams of the salt fall on the counter. What is the total amount of grams of the new solution.
92 grams
How would you separate a mixture of oil and water?
Since oil is less dense than water, it will float on top. You can carefully pour off the oil into another container, leaving the water behind. This method is simple but may not remove all the oil.
Give an example of three mixtures that are created with solids and liquids.
Sand in water, cereal in milk, coffee grounds in water.
How would you separate a saltwater and sand solution?
1. Use a filter to remove the sand. 2. Boil the water to evaporate it, leaving the salt behind.
Give an example of 4 mixtures found at home.
Salt and pepper, sugar and flour, oil and vinegar, air (a mixture of gases)
What demonstrates the conservation of matter in water cycles?
The total amount of water on Earth remains constant, cycling between liquid, vapor, and ice.