Mass
The amount of matter an object contains.
What is mass?
You do this to tell if something is a solution.
Evaporate the liquid. If something is left behind it was dissolved in the water.
A material made by combining two or more substances, where each substance keeps its own properties.
What is a mixture?
The substances that are present before a chemical reaction takes place.
What are reactants?
This tool is used to measure the mass of an object.
What is a balance?
If 500 grams of ingredients are placed in a bowl, the mixture will have this mass.
What happens to a solution if you leave it sit for a day in the sun?
Part of the water evaporates and the solution gets more concentrated.
A mixture in which one substance dissolves evenly into another substance.
What is a solution?
The new substances formed during a chemical reaction.
What are products?
When salt disappears into water, it has not vanished. It has done this.
What is dissolved?
If you mix 10 grams of baking soda and 60 grams of vinegar in an open cup what would the mass (approximately) be and why?
The mass would be a bit less than 70 grams because the chemical reaction made gas, which escaped, so it weighs less.
You mix up some fruit punch drink mix with water. It tastes perfect. Then you boil it on the stove for several minutes. Besides being hot, what has changed about the taste of your fruit punch and why?
It now tastes sweeter, more concentrated, has a stronger flavor because some of the water evaporated. None of the fruit punch drink mix evaporated. It's the same amount of drink mix, but with less water.
The substance that gets dissolved in a solution.
What is a solute?
A solid that forms when two liquids are mixed during a chemical reaction.
What is a precipitate?
A student mixes sand and water. This method can be used to separate the sand from the water.
What is filtration?
If you mix 10 grams of baking soda and 60 grams of vinegar in a closed cup what would the mass (approximately) be and why?
You mix water and hot chocolate mix. Then you leave it boiling on the stove for awhile. What happens to the taste of the hot chocolate when if finally cools down enough for you to taste it? Why?
It is more concentrated / has a stronger hot chocolate flavor. This is because the amount of the hot chocolate powder is still the same, but the amount of water is decreased. Some of it evaporated. So now the solution tastes much stronger.
The substance that does the dissolving in a solution.
What is a solvent?
When baking soda and vinegar are mixed, bubbles form because a new substance is produced. This is evidence of this type of change.
What is a chemical reaction?
The total mass of matter stays the same before and after mixing substances or during a chemical reaction in a closed system (a sealed bag or closed cup). True or false?
True
It looks balanced because the two cups have the same amount of a filtered solution.
A mixture of gravel, sand, and water can be separated because the substances keep these.
What are "their original properties?"
The process of separating a dissolved solid from a liquid by allowing the liquid to disappear.
What is evaporation?
These are four signs that a chemical reaction may have occurred.
What are color change, gas production (bubbles), temperature change, and formation of a precipitate?
Sugar water looks the same throughout because it is this type of mixture.
What is a solution?