How to carry out this experimenrt when sulphuric acid is between 0.05 adn 0.15 moldm-3. And risk assement. Plaese answer asap as due in tommorow
2007-04-17 07:05:37 · 2 answers · asked by chem lover 1 in Science & Mathematics ➔ Chemistry
25ml of sodium carbonate solution in the conical flask. Dilute sulphuric acid in the burette.
1st end-point - use phenolphthalein. 2nd endpoint - use methyl orange. The equivalence points will be in a volume ratio of 1:2.
Risk assessment: dilute sulphuric acid is an irritant.
2007-04-21 06:51:48 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
You need to know the volume of sodium carbonate used and the molarity of the acid. If the acid is molar then you ave used 19.73/1000 moles. Since one mole of the acid reacts with one mole of the carbonate then the solution you have must also contain this number of moles of carbonate. Say it was 25 cc. Then 1000 cc of the carbonate contain 1000/25 times 19.73/1000 moles or 19.73/25 moles per litre
2016-05-17 09:05:29 · answer #2 · answered by ? 3 · 0⤊ 0⤋