Dilute sulphuric acid was added to aqueous sodium hydroxide until it is in excess.
c, Is the final solution (sodium sulphate) acidic or alkaline?
d. Describe a test to prove your answer for part (c).
2006-09-16 19:38:13 · 5 answers · asked by sweetSPEED 2 in Science & Mathematics ➔ Chemistry
since sulphuring acid is added in excess, all the sodium hydroxide would have reacted completely. the mixture is acidic. sodium sulphate should be acidic due to the presence of sulphate ion. to test acidity, use litmus solution :)
hope this helps!
note to ABOVE: you shouldn't stick the litmus paper into the product. litmus solution is preferred. the paper is used mostly to test for acidity/alkali of a gas.
plus, the question asked specifically for whether the sodium sulphate is acidic or alkaline, not the final MIXTURE of solution.
2006-09-16 19:48:18 · answer #1 · answered by Shanella 1 · 0⤊ 0⤋
Exactly as rod said. Think about it, when you add a bunch of acid in excess to a base it will definately become acidic just because of the sheer quantity of acid in there. Not to mention sulphuric acid has a very low pH. Litmus is the way to go to proving that. Just stick a piece in there and see what color it turns...I believe red for acid, green for neutral, and blue(or maybe purple) for base. You may want to check that, though...there's always a chart on a litmus paper bottle.
2006-09-17 02:48:08 · answer #2 · answered by Shaun 4 · 0⤊ 0⤋
when sulphuric acid is added in excess, the solution is acidic. the various ways you can check it are:
1. using a pH meter.
2. using a litmus paper.
3. indicators.
2006-09-17 02:50:42 · answer #3 · answered by Charu Chandra Goel 5 · 0⤊ 0⤋
it's acidic... you can just test it with litmus paper
2006-09-17 02:42:54 · answer #4 · answered by teroy 4 · 0⤊ 0⤋
it will be acidic. use litmus paper or indicators.
2006-09-17 05:18:39 · answer #5 · answered by siangal07 2 · 0⤊ 0⤋