Water & Solutions (U1 S2)

Question 1

The pH scale ranges from 0-14, where fluids with a pH of 7 are considered ________.

Accepted Answer

neutral

Question 2

Hydrogen ions are negative and hydroxide ions are positive.

Accepted Answer

False

Question 3

____________ is the property of water that allows water molecules to stick to other water molecules.

Accepted Answer

cohesion

Question 4

Water can store LOTS of heat, releasing it slowly over time. What is this property of water called?

Accepted Answer

high specific heat

Question 5

When a substance is mixed into another substance and is evenly distributed, the mixture is called a solution.

Accepted Answer

True

Question 6

________ is the property of water that allows water molecules to stick to other molecules, especially polar substances.

Accepted Answer

adhesion

Question 7

Water may spontaneously break, forming two products: a hydrogen ion and a hydroxide ion.

Accepted Answer

True

Question 8

A high concentration of hydroxide (OH-) ions means that a fluid is __________.

Accepted Answer

basic

Question 9

Cohesion allows water to form a mesh of molecules on the surface, which can resist pressure. What is this called?

Accepted Answer

surface tension

Question 10

Water is a(n) _________ solvent because it can dissolve MANY different substances, especially polar and ionic compounds.

Accepted Answer

universal

Question 11

Sweat cools the skin when it ___________, carrying heat away from the body.

Accepted Answer

evaporates

Question 12

FROM THE SIMULATION LAB: Which of the following fluids were acidic?

Accepted Answer

soda pop, vomit

Question 13

A high concentration of hydrogen (H+) ions means that a fluid is ________.

Accepted Answer

acidic

Question 14

Polarity is the property by which water can bond to other substances that have slightly negative and positive charges.

Accepted Answer

True

Question 15

FROM THE SIMULATION LAB: Which of the following fluids were basic?

Accepted Answer

hand soap, drain cleaner

Question 16

When water freezes, its molecular structure changes, and molecules cannot form a dense structure. What is this called?

Accepted Answer

low solid density

Questions 16