A 0.30 M solution of AlCl3 contains?

2018-06-26 9:56 am
a. 0.30 M Al3+ ions and 0.30 M Cl- ions.
b. 0.60 M Al3+ ions and 0.60 M Cl- ions.
c. none of the above
d. 0.30 M Al3+ ions and 0.60 M Cl- ions.
e. 0.30 M Al3+ ions and 0.90 M Cl- ions.


TYSM!!!

回答 (4)

2018-06-26 5:14 pm
Each mole of AlCl₃ contains 1 mole of Al³⁺ ions and 3 moles of Cl⁻ ions.

In 0.30 M solution of AlCl₃ :
Molarity of Al³⁺ ions = (0.30 M) × 1 = 0.30 M
Molarity of Cl⁻ ions = (0.30 M) × 3= 0.90 M

The answer: e. 0.30 M Al³⁺ ions and 0.90 M Cl⁻ ions.
2018-06-26 10:09 am
AlCl3 solution....

The subscripts in a chemical formula tell the number of moles of each element in one mole of the compound.

A 0.30M solution will contains 0.30 moles per liter of Al^3+ ions and 0.90 moles per liter of Cl^- ions.
2018-06-26 10:43 am
Assuming you have 1.0 L of 0.30M solution, then 'e'.
2018-06-26 10:14 am
When one mole of aluminum chloride is dissolved in water, one mole of aluminum ions and three moles of chloride ions are formed. 0.30 M means 0.30 mole of aluminum chloride is dissolved in one liter of water.

Number of moles of Al+3 = 0.30
Number of moles of Cl-1 = 0.90
Letter e is the correct answer.


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