10ml of milk of magnesia mixed with 10ml of sulphuric acid with the same concentration. What will be the resultant color of ph paper ?
Answers
Answer:
Sulphuric acid produces two H+ ions on dissociation.
straight H subscript 2 SO subscript 4 space rightwards arrow over leftwards arrow with blank on top space 2 straight H to the power of plus space plus space SO subscript 4 superscript 2 minus end superscript
whereas, Magnesium hyroxide also produces two ions of hydroxide ion on dissociation.
Mg left parenthesis OH right parenthesis subscript 2 space stack rightwards arrow over leftwards arrow with blank on top space Mg to the power of 2 plus end exponent space plus space 2 HO subscript blank superscript minus
When equal volume of both solutions are mixed together they form water and salt by neutralisation reaction as one is acid and other is base.
space 2 straight H to the power of plus space plus space SO subscript 4 superscript 2 minus end superscript plus space Mg to the power of 2 plus end exponent space plus space 2 OH to the power of minus space rightwards arrow with blank on top space space 2 straight H subscript 2 straight O space plus space MgSO subscript 4 superscript blank
Therefore, for neutral solution universal indicator shows green colour.