Exam 8: Water Everywhere: A Most Precious Resource

Hard water in parts of the Midwest may have a calcium ion concentration as high as 400 ppm.What is this calcium ion concentration when expressed as a percentage?

The pH of rain water falling through an unpolluted atmosphere is closest to

Which of the following is a weak base?

The drawing shows two water molecules.Which statement is correct?

Calculate the pH of a solution prepared by dissolving 1.2 g of potassium hydroxide (KOH) in 1,250 mL of water.

Reverse osmosis is illustrated in this diagram.What is this process used for?

Which correctly describes groundwater?

Which of the following are methods of making sea water appropriate for drinking? (More than one choice may be appropriate. )

Numbers 1 through 4 are used to identify four different elements.Based on periodic table trends,which number identifies the element that is expected to have the greatest tendency to attract a shared pair of electrons?

What atmospheric component is responsible for the natural acidity of rain?

Evaluate the ratio M_H+ (pH 3) / M_H+ (pH 7).

Electronegativity

A proton released by an acid in aqueous solution quickly reacts with water to form a hydronium ion.What product is formed when a proton reacts with ammonia (NH₃)?

The fact that carbon (C) is less electronegative than nitrogen (N) means that in a C - N bond,the

A 0.25 M aqueous solution of potassium chloride,KCl,is tested for conductivity using the type of apparatus shown.What do you predict will happen?

Predict the products of the chemical equation: 3 LiOH + H₃PO₄ $\rarr$

A polar covalent bond is created when

Lakes surrounded by ________ have very little acid-neutralizing capacity. I.marble II)granite III)limestone

Which reaction represents an acid-base neutralization reaction?

A disadvantage of ozonation over chlorination is