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Study Quiz 1
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1
What is the trend in the strength of binary acids from left to right across a period?
A)Acid strength decreases.
B)The electronegativity of the element bonded to the H atom decreases.
C)Acid strength does not change significantly.
D)Acid strength increases.
2
Why does the strength of binary acids increase down a group?
A)Bond strength increases.
B)Electronegativity increases down a given group.
C)More energy is required to remove the proton.
D)Bond strength decreases.
3
The relative strength of an oxoacid
A)increases as the number of oxygen atoms increases because the O–H bond becomes more polar
B)increases as the number of oxygen atoms increases because the O–H bond becomes less polar
C)decreases as the number of oxygen atoms increases because the O–H bond becomes more polar
D)decreases as the number of oxygen atoms increases because the O–H bond becomes less polar
4
Which statement is true regarding solutions of Mg(OH)2?
A)Concentrated solutions can be made because it is a strong base.
B)Only dilute solutions can be made because it is a weak base.
C)The small amount of Mg(OH)2 which dissolves in water dissociates completely.
D)Solutions of Mg(OH)2 have a low pH.
5
Which of the following statements about H3PO4(aq) is true?
A)H3PO4(aq) is a strong polyprotic acid.
B)H3PO4(aq) is a weak polyprotic acid.
C)H3PO4(aq) has only one H atom than can dissociate.
D)H3PO4(aq) is not a polyprotic acid.
6
Which of the following is not a strong acid?
A)HClO3
B)HBr
C)HF
D)H2SO4
7
Which solution has the lowest pH?
A)0.1 mol/L CH3COOH
B)0.1 mol/L HCl
C)0.1 mol/L NH3
D)0.1 mol/L NaOH
8
A student pours 30.0 mL of a 1.2 mol/L solution of HCl into 45.0 mL of a 0.60 mol/L solution of NaOH. What is true about the pH of the resulting solution?
A)The pH is less than 7.
B)The pH is greater than 7.
C)The pH equals 7.
D)There is not enough information given to answer the question.
9
A student pours 40.0 mL of a 1.5 mol/L solution of KOH into 30.0 mL of a 2.0 mol/L solution of HNO3. What is true about the pH of the resulting solution?
A)The pH is less than 7.
B)The pH is greater than 7.
C)The pH equals 7.
D)There is not enough information given to answer the question.





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