Aqueous sulfuric acid H2SO4 will react with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2O. Suppose 62. g of sulfuric acid is mixed with 33.8 g of sodium hydroxide. Calculate the minimum mass of sulfuric acid that could be left over by the chemical reaction. Round your answer to 2 significant digits.

Approximately .

Explanation:

(a diprotic acid) reacts with (a monoprotic base) at a one-to-two ratio:

.

In other words, if and represent the number of moles of the two compounds reacted, then:

.

Look up the relative atomic mass data on a modern periodic table:

Calculate the (molar) formula mass of and :

.

.

Calculate the number of moles of formula units in that of :

.

Apply the ratio to find the (maximum) number of moles of that would react with the of :

.

Calculate the mass of that of :

.

When the maximum amount of is reacted, the minimum would be in excess. Hence, the minimum mass of

(rounded to two significant figures.)

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.