EXERCISE NO. 9

• Taste bitter
• Turn litmus
• Feel soapy or slippery (react with fats to make soap)
• React with acids

• Taste sour
• Turn litmus
• React with active metals – Fe, Zn
• React with bases

100% dissociation into ions

partial dissociation,
both ions and molecules

• Its properties are due to hydrogen ion or the hydronium ion H3O
• pH<7
• Turn blue litmus paper to redWhy

• Its properties is due to its hydroxyl ion of hydroxide ion OH
• pH>7
• Turns red litmus paper to blue

electric instrument that use electrode

Determination of pH

Complex organic compound that are of one color if hydrogen ion conc. is above a certain value and of different color it is lower.

a-colorless b- pink

a- red b-yellow

a- yellow b- blue violet

• Danish chemist
• Introduced his pH scale in 1909 it is very valuable and is still used today
• It gave doctors, chemists, and gardens ameasurement that could
tell them exactly how acid, alkaline or neutral a substance

What does pH mean?

• One of the most important and frequently
used analytical procedures in biochemistry
• It is the logarithm of the reciprocal of the H
ion concentration

Parang formula ng pH

In Bronsted Lowry Theory, who donates proton?

In Bronsted Lowry Theory, who accepts proton?

In Lewis Theory, what does acid accepts?

In Lewis Theory, who donates electron?

In Arrhenius Dissociation Theory who liberates (H+) Hydrogen in
aq. solution

In Arrhenius Dissociation Theory who liberates (OH-) Hydroxyl in
aq. solution

A well known stimulant and a weak base (Charles D. Winters)

Excretes the strong acid sulfuric acid in self defense

Weak acid that has been used as an analgesic over 100 years

Representative of the amino acids that are the basis of proteins

Why masakit ang kagat ng ants?

The tartness of lemons and oramges comes from what

Found widely in nature and in manu consumer products