Unit 12 B Intro to Understanding Water Chemistry and Properties

What characteristic of water allows it to have a part with a positive charge and a part with a negative charge?

• It is a polar molecule

• It is a non-polar molecule

• It has equal electron sharing

• It forms ionic bonds

How does water's polarity affect its properties?

• It enables hydrogen bonding

• It increases its electrical conductivity

• It decreases its boiling point

• It makes it less reactive

What happens to water molecules when they heat up?

• They form stronger hydrogen bonds

• They separate into hydrogen and oxygen

• They break hydrogen bonds

• They form covalent bonds

What property of water helps regulate body temperature during exercise?

• Low surface tension

• High thermal conductivity

• High specific heat

• Low specific heat

What is the effect of water's high specific heat on the environment?

• It causes rapid temperature changes

• It decreases atmospheric pressure

• It stabilizes ocean temperatures

• It increases humidity

Why does a paper clip float on water?

• Due to water's high density

• Because of water's surface tension

• Because the paper clip is waterproof

• Due to the buoyant force of water

What phenomenon, that causes the property called surface tension, allows insects to walk on water?

• Hydrogen bonding

• Gravitational pull

• Capillary action

• Ionic bonding

What causes the meniscus to form in a graduated cylinder?

• Water's density

• Water's viscosity

• Water's adhesion to the cylinder

• Water's cohesion

What is the role of water in a solution?

• It acts as a solute

• It forms covalent bonds with solutes

• It acts as a solvent

• It prevents solutes from dissolving

All solutions are made up of two parts, the solute and the solvent. What is the primary role of solutes in a solution?

• To be dissolved by the solvent

• To increase the solution's volume

• To dissolve the solvent

• To act as catalysts