SAT Subject Test Chemistry,10 edition

(Marvins-Underground-K-12) #1

RELATIONSHIP ANALYSIS QUESTIONS


These questions consist of a specific statement (I) followed by an explanation (II). You must
determine if both are true and whether or not the explanation properly explains the statement.


Directions: Each question below consists of two statements, statement I in the left-hand column
and statement 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. Then, fill in the
corresponding T or F ovals on your answer sheet. Fill in oval CE only if statement II is
a correct explanation of statement I.


Questions   5–6

For question 5, HBr is a strong acid. Low pH indicates a strong acid because of a high hydrogen ion
concentration. Bromine (Br – ) is the conjugate base of HBr. So statement I is true, but statement II is
false.


For question 6, you know from the Pauli exclusion principle that no two electrons in the same atom
can have identical quantum numbers. So, with n, l, and ml the same, they may have different ms
numbers only. The n value indicates that these electrons are in the same shell. The value of n also
limits the value of l, defining the possible subshells the electrons can occupy. If they have the same l
value, they must be in the same subshell if they are in the same atom. Well, the l value limits the ml
value, which defines the specific spatial orientation of the orbital the electrons are in. If the ml value
is the same for two electrons, they are in the same orbital. So, since the identical ml value puts these
two electrons in the same orbital, the Pauli principle states that we can distinguish them by their ms


value. One will have an ms value of and the other will be . So both statements are true, and
statement II is a correct explanation of statement I.


I II
BECAUSE Bromine is very acidic.

BECAUSE they    have    the same    n,  l,  and ml  values.

1.


5. A    2M  solution    of  HBr has a   low pH

6. Two  electrons   in  the same    orbital will    have    opposite    spins
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