Angie asked in Science & MathematicsChemistry · 2 years ago

# how do you calculate the moles of I- when the concentration is .010MKI and the volume is 10 mL?

I understand how to find the moles of KI itself but I dont know how to find the moles of just I-, like it is required me to do so. Please explain.. and will the same process be used with H+ and BrO3??

Relevance
• 2 years ago

Moles of I- ......

It's the same. Since KI ionizes completely upon dissolving, you will have the same number of I- ions as you do formula units of KI.

KI(s) --> K+ + I-

0.01M ......... 0.01M

Remember, the subscripts in a chemical formula tell you the number of moles of that atom or ion in 1 mole of the compound.

K2SO4(s) --> 2K+ + SO4^2-

0.01M ........ 0.02M... 0.01M

Fe(C2H3O2)3(s) --> Fe3+ + 3C2H3O2^-

0.01M .................... 0.01M.......0.03M

• 2 years ago

.010MKI? do you mean

0.010 molar solution KI

0.010 mole per Liter

0.010 mole per Liter x 0.01 L = 0.0001 mole

KI molar mass is 39.1 + 126.9 = 166.0 g/mole, and one mole has 126.9 g/mole of I

126.9 g/mole of I x 0.0001 mole = 0.01269 g of I

• KennyB
Lv 7
2 years ago

KI --> K+ + I-

There is one mole of I- for every mole of KI. (When it dissociates, it goes completely to K+ and I-.)

Hence 0.010 L * 0.010 moles/L gives 0.001 moles