Biochemistry Lab#2 (pH Scale & Neutralizaytion) Midterm Reviewer

pH scale

is a measure of how acidic or basic a substance is, ranging from 0 to 14.

acidic

pH below 7 indicates an _____ solution,

7

pH of ___ is neutral,

neutral

pH of 7 is _______

basic (alkaline)

pH above 7 is ________

pH paper

is a tool used to determine the approximate pH of a solution by

measuring its acidity or alkalinity

acid base titration

is a quantitative analysis method for estimating the concentration of an acid or base by precisely neutralizing it with a standard solution of base or acid of known concentration

pH stands for

potential of hydrogen

Neutral solution

For pure water at 25°C, [H+]=[OH−]=1×10−7 M, so both pH and pOH are equal to 7.

Acidic solution

When pH<7, the solution is acidic.

Basic Solution

When pH>7, the solution is basic.

Materials (Acidic)

Black Coffee

Soft Drink

Distilled Water

MIlk

Lemon Juice

Vinegar

H2SO4 (Sulfuric Acid)

Materials (Basic)

NaOH (Sodium Hydroxide)

NaHCO3 (Sodium Bicarbonate)

Baking Soda Solution

Soap

Materials (Neutral)

Tap Water

Neutralization

a chemical reaction between an acid and base that forms a salt and water