Question

1) When you invert the buret in the beaker, the water level in the beaker will be much lower than that of buret. How come the water in the buret stays in place without emptying into the beaker?

2)Consider the redox reaction:

In⁺ (aq) + 2Ag⁺ (aq) -----> In³⁺ (aq) + 2Ag (s)

what is the equivalent mass of indium in this reaction. show all steps.

Answer 1

1)

an empty buret is taken

invert it and submerge in the beaker

now

the buret is empty but it has air in it

also

the pressure of air inside the buret is less than the air outside

so

the outside air pushes the water into the buret to balance the pressure

the water flows into the beaker until the pressure of air inside and outside are equal

because of this reason

the water in the buret stays in place without emptying into the beaker

2) consider the given reaction

In+ + 2Ag+ ---> In3+ + 2Ag

now

we know that

equivalent mass = atomic mass / change in oxidation number

from the given reaction

change in oxidation number of indium = 3 - 1 = 2

aslo

we know that

atomic mass of indium = 114.818

so

equivalent mass = 114.818 / 2

equivalent mass = 57.409

so

the equivalent mass of indium in this reaction is 57.409 g /mol