Biology: Section 2.2 Review Questions
How much stronger is each pH than the next?
10 times
What is a pH scale?
A logarithmic scale for comparing the relative concentrations of hydronium ions and hydroxide ions
What is a solution?
A mixture of two or more substances (Solvent + Solute)
What is a suspension?
A mixture of water and a nondissolved substance
Why is it called a polar molecule?
Because it has a PARTIAL negative end and a PARTIAL positive end
As the number increases, the level of acidity...
Decreases
What is the chemical symbol for water?
H2O
Te pH scale ranges from...
O to 14
Where is the partial positive end?
On the hydrogen atoms
Where is the partial negative end?
On the oxygen atom
What is the water molecule called?
Polar Molecule
Example of solute...
Table salt - NaCl (sodium chloride)
What is hydrogen bonding?
The attraction between a hydrogen atom with a partial positive charge and another atom with a partial negative charge (ex. Water molecules bonding)
What is cohesion?
The attraction of two molecules of the same substance
What is one of the most important aspects of a living system?
The degree of acidity or alkalinity
What is a solvent?
The most quantity of a substance that makes the solute dissolve
What is a solute?
The substance that is dissolved
Example of solvent...
Water - the universal solvent
What is acid?
When the number of hydronium ions in a solution is greater than the number of hydroxide ions
What are bases?
When the number of hydroxide ions in a solution is greater than the number of hydronium ions