A student stops a titration BEFORE the equivalence point is reached. If NaOH is
being added to an unknown acid, HA, what
ions are present in the clear solution in the
flask?
A. H+, A-, Na+, OH-
B. A-, Na+, OH-
C. A-, Na+ and H+

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

How does the value of the equilibrium constant show that a reaction reaches equilibrium very quickly? (a) the equilibrium constant is large. (b) the equilibrium constant is small. (c) the equilibrium constant is zero. (d) the value of the equilibrium constant does not show how quickly a reaction comes to equilibrium.

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.