Question 2. Which is the formula for the hydronium ion? A)	OH - B)	H 2 O C)	H 3 O + D)	H 3 O - E)	H 2 O +. Question 3. Which one of the following statements about strong acids is true ? A)	All strong acids have H atoms bonded to electronegative oxygen atoms.
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electronegative oxygen atoms
Question 2 • Which is the formula for the hydronium ion? • A)	OH- • B)	H2O • C)	H3O+ • D)	H3O- • E)	H2O+
Question 3 • Which one of the following statements about strong acids is true? • A)	All strong acids have H atoms bonded to electronegative oxygen atoms. • B)	Strong acids are 100% ionized in water. • C)	The conjugate base of a strong acid is itself a strong base. • D)	Strong acids are very concentrated acids. • E)	Strong acids produce solutions with a higher pH than weak acids.
Question 6 • What is the concentration of H+ in a 2.5 M HCl solution? • A)	0 • B)	1.3 M • C)	2.5 M • D)	5.0 M • E)	10. M
Question 8 • The OH- concentration in a 7.5 x 10-3 M Ca(OH)2 solution is • A)	7.5 x 10-3 M. • B)	1.5 x 10-2 M. • C)	1.3 x 10-12 M. • D)	1.0 x 10-7 M. • E)	1.0 x 10-14 M.
Question 9 • The OH- concentration in a 2.5 x 10-3 M Ba(OH)2 solution is • A)	4.0 x 10-12 M. • B)	2.5 x 10-3 M. • C)	5.0 x 10-3 M. • D)	1.2 x 10-2 M. • E)	0.025 M.
Question 10 • What is the H+ ion concentration in a 4.8 x 10-2 M KOH solution? • A)	4.8 x 10-2 M • B)	1.0 x 10-7 M • C)	4.8 x 10-11 M • D)	4.8 x 10-12 M • E)	2.1 x 10-13 M
Question 11 • Calculate the H+ ion concentration in a 8.8 x 10-4 M Ca(OH)2 solution. • A)	8.8 x 10-4 M • B)	1.8 x 10-3 M • C)	2.2 x 10-11 M • D)	1.1 x 10-11 M • E)	5.7 x 10-12 M
Question 16 • Calculate the pH of a beer in which the hydrogen ion concentration is 6.3 x 10-5 M. • A)	4.2 • B)	4.8 • C)	5.63 • D)	9.8 • E)	14.0
Question 18 • Calculate the H+ ion concentration in lemon juice having a pH of 2.4. • A)	4.0 x 10-2 M • B)	250 M • C)	0.38 M • D)	4.0 x 10-3 M • E)	12 M
C C B A B C C B C E E A E A E A E D C B Answer Key – Chapter 15