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mr_godi [17]
3 years ago
5

When 4.96 g of a nonelectrolyte solute is dissolved in water to make 485 mL of solution at 27 °C, the solution exerts an osmotic

pressure of 827 torr. What is the molar concentration of
Chemistry
1 answer:
Bogdan [553]3 years ago
5 0

Answer:

concentration = 0.044 moles / L

Explanation:

The mass of non electrolyte solute dissolved in water =4.96 grams

The volume of water taken = 485mL = 0.485 L

the temperature = 27°C = 300 K

osmotic pressure = 827 torr = \frac{827}{760}atm=1.09atm

The osmotic pressure is related to molar concentration as:

osmotic pressure = concentration X R X T

Where

R = gas constant = 0.0821 L atm/molK

Putting values

1.09 = concentration X 0.0821 X 300

concentration = 0.044 moles / L

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For the reaction KClO2⟶KCl+O2 KClO2⟶KCl+O2 assign oxidation numbers to each element on each side of the equation. K in KClO2:K i
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Answer:

Explanation:

The formula of the reaction:

            KClO₂ → KCl + O₂

To assign oxidation numbers, we have to obey some rules:

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  2. The charge on simple ions signifies their oxidation number.
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The oxidation number of K in KClO₂:

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                                    K-5 = 0

                                    K = +5

The oxidation number of K in KCl:

                                K + (-1) = 0

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The oxidation number Cl in KClO₂ is -1

For Cl in KCl, the oxidation number is -1

For O in KClO₂, the oxidation number is (2 x -2) = -4

For O in O₂, the oxidation number is 0

K moves from an oxidation state of +5 to +1. This is a gain of electrons and K has undergone reduction. We then say K is reduced.

O moves from an oxidation state of -4 to 0. This is a loss of electrons and O has undergone oxidation. We say O is oxidized.

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Then, we can write the formula as :

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Empirical Formula :

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<u></u>

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