Equilib and Strength [Duplicate]

Each strip of pH paper was dipped in equal concentration of an acid or base.  Which strip represents the strongest base?

• A
• B
• C
• D

Use the K_a values to determine whether there are more products or reactants at equilibrium for the given reaction.
K_a NH_4^+1= 5.6x10^-10
K_a HCO_3^-1= 4.8x10^-11

• More  products. 
  K_a NH_4^+1 > K_a HCO_3^-1
• More  products. 
  K_a NH_4^+1 < K_a HCO_3^-1
• More  reactants. 
  K_a NH_4^+1 > K_a HCO_3^-1
• More  reactants. 
  K_a NH_4^+1 < K_a HCO_3^-1

Which of the following acids in water would most likely result in a strongly lit light bulb that is connected to electrodes?

• HNO_3; K_a > 1
• HClO_2; K_a = 1.1x10^-2
• HCH₃H₅O₃; K_a = 1.38x10^-4
• H_2CO_3; K_a = 4.3x10^-7

Consider the general equation for an acid in water:
HA(aq) + H2O ↔ H3O+ + A-
If there is a lot of product, what does that tell you about the acid?

• K_a > 1  Strong acid
• K_a > 1  Weak acid
• K_a < 1  Strong acid
• K_a f< 1  Weak acid

Which of the following correctly describes the strengths of the acids in solution?

• HA and HB are both examples of strong acids.
• HA and HB are both examples of weak acids.
• HA is an example of a strong acid, HB is an example of a weak acid.
• HA is an example of a weak acid, HB is an example of a strong acid. 

Which is the weakest acid?

• HF
• HNO_2
• CH_3COOH
• HClO

When citric acid is produced by the cells of an orange and dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as a

• concentrated acid. 
• weak acid. 
• dilute acid.
• strong acid.

A substance that ionizes completely in solution is

• an insulator.
• a strong electrolyte. 
• a weak acid.
• a non-electrolyte.

Which of the following substances would likely create the most conductive solution?

• a weak acid 
• a weak base
• a strong acid
• an insoluble salt

When the chemical reaction A + B ↔ C+ D is at equilibrium,

• both the forward and reverse reactions have stopped.
• the sum of the concentrations of A and B equals the sum of the concentrations of C and D.
• all four concentrations are equal.
• neither the forward nor the reverse reactions have stopped.