Chapter 3 Flashcards
How are the atoms in a water molecule bonded together?
Polar covalent bonds
Sulfur is in the same column of the periodic table as oxygen, but has electronegativity similar to carbon compared to water molecules molecules of H2S will-
Not form hydrogen bonds with each other
What can water molecules form hydrogen bonds with?
Compounds have polar covalent bonds
How do properties of water molecules such as cohesion surface, tension, and adhesion occur?
They are a result of hydrogen bonding
Liquid water has water quality?
It has a heat of vaporization higher than most other molecules
Dietary calorie equals 1 kcal what does 1 kilo calorie equal?
It equals 1000 cal or the amount of heat required to raise the temperature of 1 kg of water by 1°C
Why does ice float in liquid water?
Stable, hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid water
Why is a steam burn more severe than a hot water burn?
Steam contains more energy than water
What does one mole of glucose equal?
180 g of glucose
You have a freshly prepared 0.1 M sucrose solution what does it mean?
It has 6.02×10^22 of sucrose molecules or 34.2 g of sucrose is present in the solution.
How does 0.5 M sucrose solution compared to 0.5 M glucose solution?
They both have 3.01 x 10^23 molecules
A solution with a pH of two has how many more protons in it than a solution with a pH of four
100 times more
What is the pH of a solution with a hydroxyl ion concentration of 10 x-10?
PH 4
What is a hydroxyl ion concentration of a solution of pH eight
10-6 M
Assume that the acid rain has lower the pH of a particular lake to pH 5.0 what is the hydroxide ion concentration of this lake?
1 x 10^-9 mole of hydroxide ions per liter of lake water
