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Home / Doubts and Solutions/JEE/Chemistry

plz and it

Asked by Umesh 4th December 2017, 9:44 AM
Answered by Expert
Answer:
The space reaction space equation space is space colon Step space straight I minus straight K subscript 2 CO subscript 3 space end subscript space space plus space space HCl space space rightwards arrow space space KCl space space plus space space straight H to the power of plus space end exponent space space plus space HCO subscript 3 to the power of minus space space space space space space space space space space space space space space space space space straight K subscript straight a subscript 1 end subscript space equals space 4 cross times 10 to the power of negative 7 end exponent Step space II HCO subscript 3 to the power of minus space space space rightwards arrow space space space straight H to the power of plus space end exponent space space plus space space CO subscript 3 to the power of 2 minus space end exponent space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space straight K subscript straight a subscript 2 end subscript space equals space 5 cross times 10 to the power of negative 11 end exponent From space space space straight K subscript straight a subscript 1 end subscript space space and space straight K subscript straight a subscript 2 end subscript space we space can space calculate space pH space that space will space be space 4 space and space 5 space respectively. pH space range space of space indicators colon Phenolphthalein comma space pH equals space 8 minus 10 Thymol space blue comma space pH space equals space 1.2 space minus space 2.8 Methyl space orange comma pH space equals space 2.9 minus space 4.5 Malachite space green comma space pH space equals space 0.2 space minus space 1.8 Therefore space indicator space used space is space Methyl space orange space left parenthesis pH space equals space 2.9 minus space 4.5 right parenthesis
Answered by Expert 5th December 2017, 12:29 PM
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