A 0.30 M solution of AlCl3 contains?
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)
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.
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.
Assuming you have 1.0 L of 0.30M solution, then 'e'.
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.
收錄日期: 2021-05-01 22:27:39
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