Flashcards in C5c- Quantitative analysis Deck (14)
What are the units for concentration?
g/dm3 or mol/dm3
What are the units for volume?
dm3 or cm3
How many cm3 in 1 dm3?
What are the particles like in a very concentrated solution?
There are more solute particles in a given volume and they are more crowded
What is the equation for concentration?
Concentration = Moles ÷ Volume
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
why is cordial diluted?
so the taste isn't too strong
why are medicines diluted?
to avoid giving overdoses
why does baby milk have to be the right concentration?
so the baby isn't harmed
What is GDA?
guideline daily amount
1 Naan Bread
Sugar - 5.4g (6%)
What does this tell you about GDA?
1 Naan Bread contains 6% of your daily sugar intake
How do you convert sodium to salt?
x (58.5 ÷ 23)
How do you convert salt to sodium?
x (23 ÷ 58.5)