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CBSE Class 10 Answered

if 10ml of H2SO4is mixed with 10ml.of mg(OH)2 of the same concentration, what is the colour of the universal indicator
Asked by jayant_abraham | 04 Mar, 2020, 09:59: PM
Expert 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.
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