Concentration
How can you increase the concentration of a solution?
add solute
If an object has a low density, will it sink or float?
float
What are the 3 ways to increase the dissolving rate of a solute in a solvent
stir the solution
decrease the particle size of the solute
heat up the solution
- definite shape
-definite volume
-particles vibrate
-non-compressible
solid
iron filings and sand
magnet
How could you decrease the concentration of a solution?
add more solvent (water)
If an object has a high density, will it sink or float?
sink
What are the 3 ways to decrease dissolving rate
cool down the solution
increase the particle size of the solute
dont stir the solution
-indefinite shape
-definite volume
-particles slide
-non-compressible
liquid
sugar water
evaporation
Which is more concentrated?
8 cups water & 4 tsp. lemonade powder
4 cups water & 4 tsp. lemonade powder
4 cups water & 4 tsp. lemonade powder
How can a mixture of ping pong balls and golf balls be separated?
add water and float the ping pong balls (less density)
When particle size is decreased, what happens to the rate of dissolving?
it increases (goes faster)
-indefinite shape
-indefinite volume
-particles expand to fill the container
-compressible
marbles and wood blocks
add water and float the wood blocks
Which is more concentrated?
1 gallon water & 1 cup sugar
2 gallons water & 1 cup sugar
Which has less density, a marble or an inflated balloon?
inflated balloon
Which dissolves faster? larger surface area or smaller surface area
larger surface area
Particles are farthest apart in which state of matter?
sand and salt
add water
pour the saltwater through a filter
evaporate the water
Which is the most concentrated?
2 drops food coloring & 1 cup water
10 drops food coloring & 1 cup water
Grace puts a metal nail, a styrofoam ball, a can of corn, and a wood block in a container of water. What property of matter is she testing?
density
When should you add sugar to tea to make it sweet?
before it cools down
solid
sand, salt, and pennies
remove the pennies with a sieve
add water
filter to remove the sand
evaporate the water