Test - Unit Two Matter Flashcards
1
Q
12.Matter of in which the particles are free to move in all directions until they have spread evenly throughout their container is a
A
Gas
U2 C3
2
Q
- Increasing the surface area of a solid
A
Increases the speed of dissolving
U2 C4
3
Q
- Density of an object
A
PP
U2 C3
4
Q
- In terms of saturation how would you classify a KBr solution with a concentration of 90g in 100 of water at 10°C
A
Unsaturated
Solubility curve ws
6
Q
50 a.
A
Melting
U2 C3
7
Q
50 c.
A
Vaporization
8
Q
53.
A
The mass isn’t destroyed it is leaving the iron and becoming the rust the total of the rust and the iron would equal the original piece of iron
9
Q
- In terms of saturation how would you classify a KNO3 solution of 30g in 100g of water at 40°C
A
Unsaturated
Solubility curve ws
10
Q
- List and explain the three factors that increase the solubility (dissolving) rate of a substance
A
Heat: heating the solvent creates more kinetic energy therefore creating more collisions
Stirring: bring fresh solvent into contact with undissolved solute.
Smaller solute size: increases the surface area of the solvent so more of it can be in contact with the solute.
