Explain how the concentration of hydronium ions and the concentration of hydroxide ions change when a base is dissolved in water.

Write a balanced chemical equation for the reaction of gaseous chlorine with solid sodium iodide where solid sodium chloride and iodine are formed.

What is meant by the term dynamic equilibrium?

Which type of substance would best dissolve in a solvent that was made of nonpolar molecules?

A a water-based solvent

$B$ an ionic compound

C a solute made of polar molecules

D a solute made of nonpolar molecules

A mixture of gases consists of 30 percent hydrogen, 40 percent helium, and 30 percent nitrogen by volume. Calculate the mass fractions and apparent molecular weight of this mixture.

Which statement is an accurate comparison of solutions and homogeneous mixtures.

A They are the same.

B They are opposites.

C Solutions are more evenly mixed than homogeneous mixtures.

D Homogeneous mixtures are more evenly mixed than solutions.

The outermost electron in an alkali-metal atom is sometimes described as resembling an electron in the corresponding state of a one-electron atom. Compare the first ionization energy of lithium with the binding energy of a 2s electron in a one-electron atom that has nuclear charge Zeff, and determine the value of Zeff that is necessary for the two energies to agree. Repeat the calculation for the 3s electron of sodium and the 4s electron of potassium.

A substance that cannot be broken down into other substances is a(n) _____.

Which of the subatomic particles has a neutral electric charge?

Which subatomic particles carry a negative charge?

Which of the following is a solution? A) pure water B) an oatmeal-raisin cookie C) copper D) vinegar

Which does NOT contain magnetic domains?

A. bar magnet

C. paper airplane

B. disc magnet

D. steel nail

Name an appropriate indicator for titrating the following:

a. a strong acid and a weak base

b. a strong base and a weak acid

Describe the concentration of hydronium ions and hydroxide ions when a base is added slowly to a white vinegar solution. The $\mathrm{pH}$ of white vinegar is $3.1$.