Problem: Which of the following pairs of substances are not conjugates?a. HO- and H2Ob. NH3 and NH2-c. HCl and H+d. HSO4- and SO42-e. HSO4- and H2SO4

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We're being asked to determine which of the following pairs of substances are not conjugates

Recall that the conjugate base of an acid is simply the compound formed when an acid loses a hydronium ion (H+). It's considered as a base because it can gain H+ to reform the acid.


On the other hand,  conjugate acid of a base is simply the compound formed when a base gains a hydronium ion (H+ or H3O+). It's considered as an acid because it can lose H+ to reform the base.

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Problem Details

Which of the following pairs of substances are not conjugates?

a. HO- and H2O

b. NH3 and NH2-

c. HCl and H+

d. HSO4- and SO42-

e. HSO4- and H2SO4

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