CHM 152 - Test 2 Jeopardy - Matt Roma

Weak Bases

100

A base that, upon dissolution in water, does not dissociate completely.

What is a weak base?

200

A Bronstead base is what?

a hydrogen acceptor 

300

The formula to find hydroxide is this....

What is pOH = -log[OH^-]?

400

Identify the conjugate base and acid in the following equation

NH₃ + H₂O ⇌ NH₄⁺ + OH^-

CB: OH^-  

CA: NH₄⁺

500

The K_b = 3.611 x 10^-9 and initial concentration of a generic base is 0.137 M. Find the concentration of [OH^-]

2.22 x 10^-5 M

Conjugates n Such

100

What is the conjugate acid of H₂O

H₃O⁺

200

What is the conjugate base of H₂C₂O₄

HC₂O₄​^-​​​

300

True or False: If an molecule accepts electrons an an acid base reaction it is Bronstead base...

False

400

In the following reaction identify the acid/base and  conjugate acid/base for the reactants and for the products 

HBr + NH₃ ⇌  Br^- + NH₄⁺           

                             

Reactants = HBr acid Br^- CB & NH₃ base NH₄⁺ CA

Products = NH₄⁺ acid NH₃ CB & Br^- base HBr CA

500

Identify which salt is acidic between these three [NH₄I] [KCl] [CaSO₄]

[NH₄I]

Weak Acids

100

An acid that does NOT dissolve completely into ions.

What is a weak acid?

200

This value determines the strength of the acid. The smaller the value, the stronger the acid.

What is pK_a

300

The formula to find hydronium ion is this...

what is pH= -log[H₃O⁺]? 

400

This type of substance donates a proton (H+ ion) to the other compound in a reaction.

What is a Bronsted-Lowry acid?

500

This substance is the conjugate base of acetic acid.

What is acetate?

Strong Acids/Bases

100

An acid that dissociates 100% into ions in a chemical reaction.

What is a strong acid?

200

All strong bases contain this molecule. 

What is Hydroxide (OH-)?

300

What is the ionization constant of water (K_w)?

What is K_w = 1 x 10^-14?

400

List the 8 common strong bases 

LiOH, NaOH, KOH, RbOH, CsOH, Ca(OH)₂, Sr(OH)_2, Ba(OH)₂

500

List the seven common strong acids

HCl, HBr, HI, H₂SO₄, HClO₃, HClO₄, HNO₃

pH

100

Presence of this atom causes a low pH number.

What is hydrogen (H+)?

200

True or False: a high concentration of [OH^-] would cause a high pH

True, the more basic the solution the higher the pH

300

This substance can be considered a weak acid and weak base at the same time.

What is water (H₂O)?

400

Determine the concentration of [H⁺] and [OH^-] if the pH is 3.45.

[H⁺] = 3.55 x 10^-4

[OH^-] = 2.82 x 10^-11

500

HCl + H₂O ---> H₃O⁺ + Cl^-   

K_a1= 3.37 x 10^-5

[HCl]_initial= 0.300 M

Find the concentration of [OH^-]

3.15 x 10 ^-12 M of [OH^-]