types Mixtures
solutions and solvents
chemical reaction
Separating mixtures and Solutions
5.2 and 5.3 other
100
Define what a mixture is.
is a combination of two or more substances.
100
Define what a solution and a solvent are.
Solution:is a mixture in which the substances are evenly spread out. Solvent: is the substance in which the solute dissolves.
100
What is a chemical property?
a chemical property is the ability of a substance to undergo a chemical change
100
How can you separate a glass of water with salt in it?
You can leave it outside so the water will evaporate and the salt will be left or you can usse a filter.
100
A change in which one or more substances are made
Chemical change
200
You can ________ the parts of a mixture without changing them into new substances.
separate.
200
Which one does not dissolves in water and does not form a solution a) salt b) sugar c) sand
The answer is: c) sand
200
The word ________is used to describe substances that can burn.
combustible
200
metal paper clips falls into a bag of scrap paper. how can we separate the paper clips from the bag of paper
use a magnet
200
Explain why cooking and rusting are chemical and not physical changes
Cooking and rusting are chemical changes because a new substance is formed
300
What can a mixture be made from?
It can be made from solid, liquids, and gases.
300
Why stirring a mixture helps the solute?
It dissolves more quickly.
300
Chemical changes _________ make or destroy matter
cannot. The total mass of substances involved in a reaction is the same before and after a chemical change
300
What can you use to separate solutions.
physical properties
300
What is new substances left behind after a paper goes through a chemical reaction?
What is Ash , Water vapor and and carbon dioxide ( both are colorless gas) are formed. Heat is released.
400
all four of these are mixtuers. which of these would also be a solution? water and sand on the beach, oil and vinegar, sugar in water, pasta and water?
sugar and water are a solution. water and sand, pasta and water, and oil and vinegar are not solutions.
400
a __________ may look like a single substance, but the parts of a mixture are not joined together.
solution
400
a _________ _____________is the prosses that rearranges the atoms in substances into new substances.
chemical reaction
400
how can objects be separated using only water?
objects with different densities can be separated because some will float in water and some would probably sink.
400
adding ____ to flour changed its color to blue; adding
iodine
500
mixtures versus compounds, what are the differences?
mixtures are not joined together and can be easily separated without changing them to new parts. Compounds: are joined together, hard to separate into its atom its atoms and have to be broken down.
500
Mixtures can be separated by
using the physical properties of the substances
500
How do chemical changes differ from phisical changes?
New substances are formedby chemical changes. Physical changes only change the physical properties of a substance. They do not form new substances.
500
If you had a mixture of paperclips, pasta, and water what would you have done to separate them?
put them into a sieve so the water would fall and then take a magnet to collect the paperclips and the pasta is left there.
500
signs of a chemical change are
gas bubbles, light is given off, color change, changes in odor or taste. . change in temperature page 151 and 152
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