Question

1~ Which of the following is the Bronsted-Lowry definition of an acid?

a). a substance the dissociates in water to produce hydroxide ions [OH-]
b). any substance that can accept hydrogen ions [H+]
c). a substance that dissociates in water to produce hydrogen ions [ H+]
d). any substance that can donate hydrogen ions [H+]

2~ Bronsted and Lowry defined an acid as which of the following?
a). substances that accepts a pair of electrons to form a covalent bond
b). substances that donates a pair of electrons to form a covalent bond
c). substance that donates H+ ions
d). substance that accepts H+ ions

3~ What is the [H+] of a solution with a pH of 5.0? Use a scientific calculator.
a). 5.0 x 10^-5
b). 7.7 x 10^5
c). 1.0 x 10^5
d). 2.5 x 10^-6

Answer 1

1. The Brønsted-Lowry definition of an acid is D), acids donate electrons.

2. Similarly, their definition of an acid is C), acids donate the H+ ions to other basic substances

3. The formula for pH is: -log[H+]. in order to find the H+ in the equation, we need to take the antilog, which would give us another formula:
`10^(-pH)`. Just plug in the ph value and we get
`1.0*10 x^(-5)`. The closest answer to that would be C). I'm not sure if there's a typo there, but it should be 1 x 10^-5