Analatyical 2 first quiz

When classified quantitative analysis based on concentration , the micro quantity be

• More than 100 mg

• Between 10 - 100 mg

• Less than 10 mg

• 500 mg

The theoretical concept for completence

of reaction.

• Equaivalent point

• End point

• Accuracy

• Analyte

Substance with known concentration used

for determination of sample

• Analyte

• Standard

• Precision

• Indicator

All that are examples for primary standard , except ..........

• hydrate salts of oxalic acid

• benzoic acid

• KHCO3

• KHSO4

chemical reaction is proportional to

the product of the active masses of the reacting substances

• Preciptation

• Velocity

• Mass

• Molecular weight

Common pharmaceutical buffer is

Sorenson’s phosphate buffer having a pH

range

• 6 - 8

• 7 - 9

• 6 - 9

• 7 - 8

Henderson-Haselbach Equations For acidic buffer

• pOH = pKb + log [salt] / [base]

• pOH = pKb + log [acid ] / [salt ]

• pH = pKa + log [salt]/[acid]

• pOH = pKb + log [base] / [salt]

They emit visible radiation

when exposed to UV light, at certain pH this property

either stop or intensify. They are used with colored or

turbid solutions, e.g. fluorescein indicator.

• Screened indicators

• Fluorescent indicators:

• Mixed indicators.

• Turbidity indicators

If Ka > Kb

the equivalence point will be

• at 7 on the

  pH scale.

• less than 7

  on the pH scale

• greater than

  7 on the pH scale

• Don't affect

The antibacterial action of...........greatest at a pH below

4.5, and the activity again increases at a pH of 10 and

above.

• Benzoic acid

• Sailcylic acid

• Phenol

• Kmno4