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manillasoccer
03.01.2020 •
Chemistry
If 200. ml of 0.60 m mgcl2(aq) is added to 400. ml of distilled water, what is the concentration of mg2+(aq) in the resulting solution? (assume volumes are additive).
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Ответ:
Final concentration of Mg2+ = 0.20 M
Explanation:
Concentration of
= 0.60 M
Volume of
= 200 mL
Volume of distilled water added = 400 mL
Final volume of the soution = 200 mL + 400 mL
= 600 mL
Final concentration of solution =![M_2](/tpl/images/0441/5049/dbfbd.png)
The final concentration is calculated as follows:
Therefore, final concentration of the solution is 0.20 M.
Therefore, concentration of Mg2+ is same as the final concentration of solution.
Final concentration of Mg2+ = 0.20 M
Ответ:
The concentration of magnesium ion, Mg²⁺ in the resulting solution is 0.2 M.
To solve this question, we'll begin by calculating the molarity of the diluted solution. This can be obtained as follow:
Volume of stock solution (V₁) = 200 mL
Molarity of stock solution (M₁) = 0.60 M
Volume of diluted solution (V₂) = 200 + 400 = 600 mL
Molarity of diluted solution (M₂) = ?The molarity of the diluted solution can be obtained as follow:
M₁V₁ = M₂V₂
0.6 × 200 = M₂ × 600
120 = M₂ × 600
Divide both side by 600
M₂ = 120 / 600
M₂ = 0.2 MThus, the molarity of the diluted solution of MgCl₂ is 0.2 M
Finally, we shall determine the concentration of Mg²⁺ in the diluted solution. This is illustrated below:
MgCl₂(aq) —> Mg²⁺(aq) + 2Cl¯(aq)
From the balanced equation above,
1 mole MgCl₂ dissolves to produce 1 mole Mg²⁺.
Therefore,
0.2 M MgCl₂ will also produce 0.2 M Mg²⁺.
Thus, the concentration of Mg²⁺ in the resulting solution is 0.2 M.
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Ответ:
The length of the canvas where Melany will mark the position of the hanger is 1.6 feet.
The given parameters:
length of the canvas = 8 feet
dimension of the hanger =![\frac{1}{5} \ of \ the \ shoe's \ length](/tpl/images/1409/8894/dc9bf.png)
To find:
the length of the canvas where Melany will mark the position of the hanger.The length of the canvas where Melany will mark the position of the hanger is calculated as follows:
Thus, the length of the canvas where Melany will mark the position of the hanger is 1.6 feet.
Learn more here: