Flashcards in Moles And Volumes Deck (28):

1

## What is the concentration of a solution?

### This is the amount of solute, in moles, dissolved in each 1dm^3of solution.

2

## What is a solute?

### A dissolved compound.

3

## What is the equation that links moles, volume and concentration together?

### Moles= Concentration X Volume

4

## What are the units for volume in the mol, vol, conc equation?

### dm^3

5

## How do you get from cm^3 to dm^3?

### Divide by 1000

6

## What is a standard solution?

### This is a solution of a known concentration.

7

## How do you prepare a standard solution?

### Dissolve an exact mass of the solute in a solvent and make the solution is to an exact volume.

8

## What is the main unit for concentration?

### mol dm^-3

9

## What are the other units for concentration that you may come across?

### g dm^-3

10

## How do you find the mass concentration of a substance?

### Use mass=Mr X moles

11

## Why do you indirectly count the number of gas molecules when you measure the gas volume?

### At the same temperature and pressure, equal volumes of different gases contain the same number of molecules.

12

## What is meant by molar gas volume?

### This is the volume per mole of gas molecules at a stated room temperature and pressure.

13

## What is the abbreviation for a molar gas volume?

### Vm (it's a little m)

14

## What are the conditions for RTP?

###
20 degrees C

101 kPa

15

## What is the volume of 1 mole of gas molecules at RTP?

### 24 dm3mol-1

16

## What is the equation for gases at RTP?

### Moles=volume/24

17

## In the equation for RTP gases what are the units for volume?

### dm3

18

## What are the 4 assumptions for the molecules making up an ideal gas?

###
Random motion

Elastic collisions

Negligible size

No intermolecular forces

19

## What is the ideal gas equation?

### pV=nRT

20

## What is the value of R, the gas constant?

### 8.134

21

## What are the units for pressure in pV=nRT?

### Pa

22

## What are the units for volume in pV=nRT?

### M3

23

## What are the units for n in the ideal gas equation?

### Mol

24

## What are the units for temperature in pV=nRT?

### K

25

## How do you get from cm3 to m3?

### X10^-6

26

## How do you get from dm^3 to m^3?

### X10^-3

27

## How do you get from C to K?

### +273

28