Version A Questions 14-16 refer to the following experimental apparatus. Test Ta
ID: 1041176 • Letter: V
Question
Version A Questions 14-16 refer to the following experimental apparatus. Test TabeTest Tube Power Supply An experiment was conducted in which two test tubes were filled with water at 25? and 1 atm pressure. test tube was subsequently inverted into a beaker containing water which was then acidified. Which of the following best describes the reaction taking place in Test Tube A? A) is positive, AG is positive 9 E is negative, AG is positive p) E-is negative, ?G"is negative Which of the following best represents the half-reaction occurring at the anode? s posive, AG is negative D) 2 H00)+2 Hae) +2 OH (ag) Which of the following best explains the difference in the water levels inside the two test tubes? As the reaction proceds, water is being dissociated at a slower rate in Test Tube A than As the reaction proceeds, water is being dissociated at a faster rate in Test Tube A than in As the reaction proceds more water is being dissociated in Test Tube A than in Test in Test Tube B P Test Tube B. Tube B. As the reaction proceeds, water is being dissociated at the same rate in each test tube, but twice as much gas is being formed in Test Tube A. D)Explanation / Answer
QUES 1 )answer (C)
REASON
at anode
2H2O(l) = O2 + 4H+ + 4e- E0 =+1.23 V
at cathode
H2(g) E0 =0.00 V
Overall reaction: 2 H2O(l) ? 2 H2(g) + O2(g)
(Eocell = Eocathode ? Eoanode) = ?1.23 V
?G°= -nFE°
Clearly Eo is having neagtive value and G on the other hand is having opposite sign of Eo therefore it has positive value.
QUES 2) (C)
AT anode oxidation takes place therefore,the reaction is
ques 3) D
REASON Overall reaction: 2 H2O(l) ? 2 H2(g) + O2(g)
the hydrogen gas is formed in test tube A and oxygen in test tube B from overall reaction it is clear that volume of hydrogen produced will be twice than that of volume of oxygen hence the option D is the correct justification.
2 H+(aq) + 2e? ?H2(g) E0 =0.00 V
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.