Exam 8: Water Everywhere: A Most Precious Resource

The recommended daily requirement of calcium is 1,000 mg.Tap water in a Midwestern city contains approximately 150 mg Ca/L.A person living in the city who drinks two liters of water in one day would receive ________ percent of his/her RDA of calcium.

What is the molarity of sodium chloride in a solution containing 0.50 mol of sodium chloride in 500 mL of water?

When table sugar (sucrose,C₁₂H₂₂O₁₁) dissolves in water,which type(s) of attraction between water and sugar molecules occur(s)? I.hydrogen bonding II)polar-polar interactions III)covalent bonding

Which covalent bond is the most polar?

Which chemical equation shows the dissociation of magnesium hydroxide?

Most aquatic life in lakes cannot survive in water with a pH less than

Which type of water may be considered pure?

Which of the following is not a consequence of biomagnification?

Predict the products of this reaction: KOH + HNO₃ $\rarr$

Which concentration is consistent with a basic solution?

A 0.25 M solution of the sugar sucrose,C₁₂H₂₂O₁₁,in water is tested for conductivity using the type of apparatus shown.What do you predict will happen?

What are the major disadvantages of using ozone instead of chlorine to disinfect water?

Every increase of one pH unit indicates

Which is not a consequence of hydrogen bonding between water molecules?

What is biological oxygen demand (BOD)?

Which of the following is not carried out by bacteria in soil?

The acid neutralizing capacity of a lake or stream most often derives from the presence of ________ in the surrounding soil or rock.

Which form of water disinfection continues to provide antibacterial protection after the water leaves the purification plant?

Which reaction accounts for the fact that the pH of rain is naturally slightly acidic?

Which reaction most accurately represents the dissociation of nitrous acid (HNO₂) in water?