Unit 1- water and intro to chem

Question 1

Acid

Answer 1

Compound that donates hydrogens to solutions. pH level is lower than 7

Question 2

Adhesion and how it affects life

Answer 2

Clinging of one substance to another- adhesion to the cell walls of a plant help counter the effects of gravity

Question 3

Base

Answer 3

Compound that accepts H ions and removes them from the solution. pH is higher than 7

Question 4

Non-polar covalent bonds

Answer 4

Molecules with an equal charge throughout. Symmetrical.

Question 5

Cohesion and their effects of life

Answer 5

The tendency of molecules to stick together- trees depend on cohesion to help transport water and nutrients up the tree’s roots.

Question 6

What is the pH scale

Answer 6

Measures acidity and basicity

Question 7

Covalent Bond

Answer 7

Two atoms “hooking up”. They share an electron to become stable.

Question 8

Polar covalent bond

Answer 8

Two+ atoms with opposite charges creating a covalent bond is a polar covalent bond. They are not symmetrical

Question 9

Polar Molecule

Answer 9

Not symmetrical. Has disproportionate charges throughout

Question 10

hydrogen bond

Answer 10

Weak and mostly temporary links between a molecule with hydrogen and another atom and/or molecule with an opposite charge. Can create bonds when the other substance is polar.

Question 11

Solution

Answer 11

Homogeneous mixture with 1+ solvent distributed through a solute easily. An example would be salt (solute) in water(solvent).

Question 12

Ionic Bond

Answer 12

One or more atoms give up/take an electron to become stable.