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Electrochemistry

Question
CBSEENCH12010877
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If α is the degree of dissociation of Na2SO4, the vant Hoff’s factor (i) used for calculating the molecular mass is

  • 1 + α

  • 1 - α

  • 1 +2α

  • 1 - 2α

Solution

C.

1 +2α

stack Na subscript 2 SO subscript 4 with 1 minus straight alpha below space rightwards harpoon over leftwards harpoon with space space space space space space space space space on top space stack 2 Na to the power of plus with 2 straight alpha below space plus space stack SO subscript 4 superscript 2 minus end superscript with straight alpha below Total space moles space equals space space 1 plus space 2 straight alpha

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