standard solution

Question 1

These solutions are termed volumetric solutions or standard solutions
They are made as accurately and precisely as possible using three decimal place balances and volumetric flasks to reduce the

Answer 1

impact of measurement uncertainties

Question 2

step one weigh out

Answer 2

precise mass of solute use weighing boat calculate weighing boat mass first

Question 3

step 2 add to a ……….. with a small amount of ……….. to help dissolve and stir with a

Answer 3

beaker
water

glass r

Question 4

step 3 transfer to a …………… using a …………

Answer 4

volumetric flask using a funnel

Question 5

step 4 add water to fill flask until hits bottom of the……… then add ……… and ………. contents

Answer 5

meniscus

bung

mix

Question 6

after transfering solution clean with distilled water to make sure no

Answer 6

solid / solution still on apparatus

Question 7

Calculate the mass of sodium hydroxide, NaOH, required to prepare 250 cm3 of a 0.200 mol dm-3 solution

Answer 7

Answer:

Step 1: Find the number of moles of NaOH needed from the concentration and volume:

number of moles = concentration (mol dm-3) x volume (dm3)

Step 2: Find the molar mass of NaOH
1

Step 3: Calculate the mass required

mass = moles x molar mass