EASY
Diploma
IMPORTANT
Earn 100
"In the field of observation, chance favours the prepared mind"- Louis Pasteur. Using the discovery of penicillin as an example, discuss the influence of an open-minded attitude on our perceptions.
Important Questions on Medicinal Chemistry
EASY
Diploma
IMPORTANT
Hydrochloric acid is primarily responsible for the acidity of gastric juice. Calculate the concentration, in and mass percentage of hydrochloric acid in the sample of gastric juice with and density .
EASY
Diploma
IMPORTANT
A well-known brand of antacids contains of aluminium hydroxide and of magnesium carbonate in each tablet.
State the separate equations for the reactions of aluminium hydroxide and magnesium carbonate with hydrochloric acid.
EASY
Diploma
IMPORTANT
A well-known brand of antacids contains of aluminium hydroxide and of magnesium carbonate in each tablet.
Determine which of the two components of the tablet will neutralise the most acid?
EASY
Diploma
IMPORTANT
A well-known brand of antacids contains of aluminium hydroxide and of magnesium carbonate in each tablet. The tablets also contain alginic acid and sodium hydrogen carbonate. The function of the sodium hydrogen carbonate is to react with alginic acid to form sodium alginate. State the function of the sodium alginate produced.
EASY
Diploma
IMPORTANT
A suspension of magnesium hydroxide in water, known as "milk of magnesia" is a common antacid. A sample of the suspension has a density of and can neutralise of hydrochloric acid. Calculate the mass percentage of magnesium hydroxide in the suspension.
EASY
Diploma
IMPORTANT
Two substances commonly used in antacid tablets are magnesium hydroxide and aluminium hydroxide. Suggest why compounds such as sodium hydroxide or potassium hydroxide cannot be used as antacids?
EASY
Diploma
IMPORTANT
Two substances commonly used in antacid tablets are magnesium hydroxide and aluminium hydroxide. Explain why alginates and dimethicone are often included in antacid tablets?
EASY
Diploma
IMPORTANT
The acidity of gastric juice can be temporarily reduced by antacids or controlled at the cellular level by certain drugs, such as renitidine (an -receptor antagonist), omeprazole, and esomeprazole (proton pump inhibitors). Each of these methods has benefits and disadvantages. Discuss how we choose between different approaches that can be utilised to solve the same problem.
