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Category > Chemistry Posted 15 May 2017 My Price 9.00

concentration of a solute

Q1.As the concentration of a solute in a solution increases, the freezing point of the solution
________ and the vapor pressure of the solution ________.
Selected Answer:
Incorrect
increases, decreases
Answers:
increases, increases
increases, decreases
decreases, increases
Correct
decreases, decreases
decreases, is unaffected
Q3 ANS 28 The value of Keq for the equilibrium
H2 (g) + I2 (g) 2HI (g) is 794 at 25 °C. What is the value of Keq for the equilibrium below?
1/2 H2 (g) + 1/2 I2 (g) HI (g) Q3. 3.65
The Keq for the equilibrium below is 7.52 × 10-2 at 480.0 °C. What is the value of Keq at this temperature for the following reaction? Q4. 0.041
The peroxydisulfate ion (S2O82-) reacts with the iodide ion in aqueous solution via the An aqueous solution containing 0.050 M of S2O82- ion and 0.072 M of I- is prepared, a
by measuring [I-]. The data obtained is given in the table below. The concentration of S2O82- remaining at 800 s is ________ M.
Q4 7.33x 10 3
The isomerization of methylisonitrile to acetonitrile
CH3NC (g) CH3CN (g) is first order in CH3NC. The rate constant for the reaction is 9.45 × 10 -5 s-1 at 478 K.
initial [CH3NC] is 0.030 M is ________ s. Q7 ANS addition of more tin metal to the anode compartment Consider an electrochemical cell based on the reaction:
2H+ (aq) + Sn (s) Sn2+ (aq) + H2 (g)
Which of the following actions would not change the measured cell potential?
Q7. 2.22
What current (in A) is required to plate out 1.22 g of nickel from a solution of Ni2+ in 0.50 hour?

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SuperTutor
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Status NEW Posted 15 May 2017 12:05 AM My Price 9.00

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