84. Heavy water, D2O (molar mass = 20.03 g mol–1), can be separated from ordinary water, H2O (molar mass = 18.01), as a result o
1 answer:
Answer:
relative rate of diffusion is 1.05
Explanation:
According to Graham's law of difussion:
Rate of diffusion is inversely proportional to the square root of molecular weight of a molecule.
For two given molecules:
The given molecules are
Water = 18.01
Heavy water =20.03
Thus the relative rate of diffusion will be:
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Answer:
The correct option is option (D).
Therefore the concentration of is 1.8×10⁻¹⁰ M and it is basic in nature.
Explanation:
List of pH:
- If pH of a solution is 7, then solution is neutral.
- If pH of a solution is grater than 7, then solution is basic.
- If pH of a solution is less than 7, then solution is acidic.
pH of a solution is = - log₁₀[H₃O⁺]
We know that,
[H₃O⁺][OH⁻] = =
(at 25°C)
Taking log both sides
log ([H₃O⁺][OH⁻]) =log =log
⇒log[H₃O⁺]+log[OH⁻] = log = -14 log 10
[since log(mn)= log m + log n, ]
⇒ - log[H₃O⁺] - log[OH⁻] = - (-14) [ log 10 =1]
⇒pH+pOH =14.
Given that,
The concentration of OH⁻ is 5.5 × 10⁻⁵ M
[H₃O⁺][OH⁻] = =
⇒[H₃O⁺] 5.5 × 10⁻⁵ M=10⁻¹⁴
⇒[H₃O⁺] = 1.8×10⁻¹⁰ M
Now check the pH of the solution.
[H₃O⁺] = 1.8×10⁻¹⁰
Taking log both sides
log [H₃O⁺] =log( 1.8×10⁻¹⁰)
⇒ -log [H₃O⁺] = - log( 1.8×10⁻¹⁰)
⇒ pH = - log( 1.8×10⁻¹⁰)
⇒ pH =9.7.
So the nature of solution is basic.
Therefore the concentration of is 1.8×10⁻¹⁰ M and it is basic in nature.