Flashcards in C5c- Quantitative analysis Deck (14)

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1

## What are the units for concentration?

### g/dm3 or mol/dm3

2

## What are the units for volume?

### dm3 or cm3

3

## How many cm3 in 1 dm3?

### 1000cm3= 1dm3

4

## What are the particles like in a very concentrated solution?

### There are more solute particles in a given volume and they are more crowded

5

## What is the equation for concentration?

### Concentration = Moles ÷ Volume

6

## How would you work out how much water needs to be added to dilute 200cm3 of a 3mol/dm3 solution to get 200cm3 of a 1.5mol/dm3 solution?

###
1)Work out ratio of the 2 concentrations (smaller one first)

1.5 : 3

1 : 2

2) Write ratio as a fraction and multiply by volume you want

½ x 200 = 100cm3 (how much of the original solution you need to use)

3) Work out the volume of water you will need

200-100= 100cm3

7

## why is cordial diluted?

### so the taste isn't too strong

8

## why are medicines diluted?

### to avoid giving overdoses

9

## why does baby milk have to be the right concentration?

### so the baby isn't harmed

10

## What is GDA?

### guideline daily amount

11

##
1 Naan Bread

Sugar - 5.4g (6%)

What does this tell you about GDA?

### 1 Naan Bread contains 6% of your daily sugar intake

12

## How do you convert sodium to salt?

### x (58.5 ÷ 23)

13

## How do you convert salt to sodium?

### x (23 ÷ 58.5)

14