14-9

Which of the following, when added to a sample of seawater, always lowers the pH value?

• Sodium bicarbonate

• Sodium chloride

• Distilled water

• Groundwater

When sodium bicarbonate is dissolved in water, the solution becomes

• acidic

• neutral

• basic

At normal atmospheric pressure, the boiling point of water is higher than the boiling point of hydrogen sulfide by

• -61

• 161

• 39

• 100

When a pH test strip is dipped into a sample of concentrated sodium hydroxide solution, the color of the strip becomes

• red

• orange

• blue

• green

The polarity of water causes

• dissolving many substances

• low density

• acidic effect

• basic effect

What is the mass of hydrogen in a sample of distilled water with a mass of 200 grams?

• 177.77

• 11.11

• 22.22

• 88.88

fluids like................

• Solids, liquids

• Solids and gases

• Solids, liquids and gases

• liquids and gases