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Subject Test Chemistry

Question 9 of 9

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SAT Subject Test

Each of the following questions consists of two statements, I in the left-hand column and II in the right-hand column. For each question, determine whether statement I is true or false and whether statement II is true or false. Select the appropriate answer combination from the choices below. Choices with a filled CE oval denote that statement II is a correct explanation of the true statement I.

                                   text HC end text text end text subscript 2 end subscript text H end text text end text subscript 3 end subscript text O end text text end text subscript 2 end subscript plus text H end text subscript 2 end subscript text O  end text stack leftwards arrow with rightwards arrow on top invisible times text C end text text end text subscript 2 end subscript text H end text text end text subscript 3 end subscript text O end text subscript 2 end subscript to the power of minus end exponent invisible times plus text H end text subscript 3 end subscript text O end text text end text to the power of plus end exponent
If some acetic acid, text HC end text text end text subscript 2 end subscript text H end text text end text subscript 3 end subscript text O end text text end text subscript 2 end subscript,  is added to the equilibrium mixture represented by the equation above, the concentration of text H end text subscript 3 end subscript text O end text text end text to the power of plus end exponent decreases BECAUSE the equilibrium constant of a reaction changes as the concentration of the reactants changes.

Select an Answer

The figure shows a sample answer grid for question number one hundred one. Option (A) shows the sample answer grid that has a true and a false bubble option for the Roman numeral I statement, a true and false bubble option for the Roman numeral II statement, and a single bubble option for C E. For the Roman numeral I statement the true bubble is filled in, for the Roman numeral II statement the true bubble is filled in, and the C E bubble is filled in.

Correct Answer: 
No

The figure shows a sample answer grid for question number one hundred one. Option (B) shows the sample answer grid that has a true and false bubble option for the Roman numeral I statement, a true and false bubble option for the Roman numeral II statement, and a single bubble option for C E. For the Roman numeral I statement the true bubble is filled in, for the Roman numeral II statement the true bubble is filled in, and the C E bubble is NOT filled in.

Correct Answer: 
No

The figure shows a sample answer grid for question number one hundred one. Option (C) shows the sample answer grid that has a true and false bubble option for the Roman numeral I statement, a true and false bubble option for the Roman numeral II statement, and a single bubble option for C E. For the Roman numeral I statement the true bubble is filled in, for the Roman numeral II statement the false bubble is filled in, and the C E bubble is NOT filled in.

Correct Answer: 
No

The figure shows a sample answer grid for question number one hundred one. Option (D) shows the sample answer grid that has a true and false bubble option for the Roman numeral I statement, a true and false bubble option for the Roman numeral II statement, and a single bubble option for C E. For the Roman numeral I statement the false bubble is filled in, for the Roman numeral II statement the true bubble is filled in, and the C E bubble is NOT filled in.

Correct Answer: 
No

The figure shows a sample answer grid for question number one hundred one. Option (E) shows the sample answer grid that has a true and false bubble option for the Roman numeral I statement, a true and false bubble option for the Roman numeral II statement, and a single bubble option for C E. For the Roman numeral I statement the false bubble is filled in, for the Roman numeral II statement the false bubble is filled in, and the C E bubble is NOT filled in.

Correct Answer: 
Yes

When a system at equilibrium is disturbed, the system will shift in a way that partially offsets the effect of the disturbance (Le Châtelier’s principle). Thus, when text HC end text text end text subscript 2 end subscript text H end text text end text subscript 3 end subscript text O end text text end text subscript 2 end subscript is added to the equilibrium mixture, the equilibrium will shift to the right. This increases the concentration of text C end text text end text subscript 2 end subscript text H end text text end text subscript 3 end subscript text O end text subscript 2 end subscript to the power of minus end exponent invisible times and text H end text subscript 3 end subscript text O end text text end text to the power of plus end exponent. Statement I is therefore false. Changes in the concentrations of reactants and products do not affect the value of the equilibrium constant; if the temperature does not change, the value of the equilibrium constant does not change. Statement II is therefore false. The correct answer is false, false.

Question Difficulty: 
hard