Chemistry Unit 4: Solutions & Solubility b)

Question 1

What is concentration

Answer 1

The amount of solute in a solvent

Question 2

What is a stock solution

Answer 2

Concentrated solution that must be further diluted before use
ex. teachers dilute chemicals from chemical companies before use in labs

Question 3

What is a Standard solution

Answer 3

A solution where precise concentration is known
ex. diluted from a stock solution in a volumetric flask

Question 4

Cw/v means… (Also called____)

Answer 4

Solute is solid (g) and solvent is liquid (mL);
Also called Percentage Weight by Volume

Question 5

Cv/v means……( Also called_____)

Answer 5

Both solute and solvent are liquids; Percentage volume by volume

Question 6

Cw/w means……(Also called____)

Answer 6

Both solvent and solute are solid; Percentage weight by weight

Question 7

Extremely low concentrations consist of ___________ OR ______________

Answer 7

ppm (parts per million) OR ppb (parts per billion)

Question 8

Equation for extremely low concentrations

Answer 8

C=mass solute/mass solution (10^x)
[x= exponent either 6,9,12]

Question 9

density of water

Answer 9

1g/1mL

Question 10

Dilution

Answer 10

Process of decreasing concentration of a solution by adding more solvent

Question 11

What things change in dilution (2)

Answer 11

Concentration (Decrease)
Volume of solution (increase)

Question 12

Two instruments to create a Dilution

Answer 12

Volumetric Flask + Pipette

Question 13

Always add a small volume of concentrated _____ to a larger volume of water

Answer 13

acid

Question 14

Serial Dilution

Answer 14

Dilution of a dilution

Question 15

Phenolphthalein (acid, N, base)

Answer 15

Colourlesss, colourless, PInk

Question 16

Bromothymol Blue

Answer 16

Yellow, Green, blue

Question 17

Universal Indicator

Answer 17

red, yellow-green, Blue-green

Question 18

Arrhenius theory on acids and bases

Answer 18

Acids and bases are able to conduct electricity by dissolving to form ions, these ions move freely in the solution to conduct electricity

Question 19

An acid ______________ in water to produce 1+ ______________ ions

Answer 19

ionizes; hydrogen

Question 20

A base _____________ in water to make 1+ _____________________ ions

Answer 20

dissociates; hydroxide