Making Solutions and Dilutions

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What is the purpose of preparing a stock solution in the process of making dilutions?

To decrease the concentration of the final solution

To reduce the uncertainty of weighing very small amounts of solute (correct)

To increase the volume of the final solution

To make the solution more convenient to handle

What is the concentration of the stock solution in the example provided?

500.0 mg/L (correct)

1.00 mg/L

50.0 mg/L

25.0 mg/L

What is the result of diluting 5.00 mL of the stock solution to a total volume of 100.0 mL?

A 50 times dilution

A 25 times dilution

A 20 times dilution (correct)

A 5 times dilution

What is the final concentration of the solution after the second dilution?

25.0 mg/L Signup and view all the answers

What is the purpose of using a volumetric flask?

To accurately measure the volume of the solvent Signup and view all the answers

What is the challenge associated with weighing 1 mg of solute?

It is a small and uncertain amount Signup and view all the answers

What is the equation used to calculate the concentration of a solution after dilution?

C1 × V1 = C2 × V2 Signup and view all the answers

What is the result of diluting 2.00 mL of the solution to a total volume of 50.0 mL?

A 25 times dilution Signup and view all the answers

What is the primary purpose of an active pharmaceutical ingredient?

To furnish a pharmacological activity or other direct effect in the diagnosis, cure, mitigation, treatment, or prevention of disease Signup and view all the answers

What is the term for the physical manifestation of a product that contains the active ingredient(s) and/or excipient(s)?

Dosage form Signup and view all the answers

What is an excipient in a medicinal product?

Any constituent of a medicinal product that is not an active substance Signup and view all the answers

What is pharmaceutical analytical chemistry?

The scientific discipline of analytical chemistry applied to pharmaceuticals Signup and view all the answers

What is a pharmaceutical preparation?

A medicinal product generally consisting of active substances that may be combined with excipients Signup and view all the answers

What is the term for the active substance in a medicinal product?

Active pharmaceutical ingredient Signup and view all the answers

What is the primary goal of pharmaceutical chemistry?

To design and synthesize an agent with a desired biological effect on the human body or other living systems Signup and view all the answers

What is a key characteristic of a 'good' drug?

All of the above Signup and view all the answers

Why is it futile to categorize drugs as 'safe' or 'unsafe'?

Because it oversimplifies the complexity of drugs and their effects Signup and view all the answers

What is a limitation of penicillin?

It has become less effective due to resistant bacterial strains Signup and view all the answers

Why is it challenging to develop a perfect drug?

Because it is impossible to achieve all the ideal criteria Signup and view all the answers

What can occur in some individuals who take penicillin?

Severe allergic reactions Signup and view all the answers

What is the primary role of pharmaceutical analytical chemistry in drug development?

To quantify the content of drug substances in a sample Signup and view all the answers

Why are new APIs patented?

To give pharmaceutical companies an exclusive right to produce and market them Signup and view all the answers

What is the difference between evaluating the quality of food or beverages and pharmaceutical preparations?

Food and beverages can be evaluated by their taste, odor, or appearance Signup and view all the answers

During which stage of drug development are efficacy and safety ensured?

Clinical trials on humans Signup and view all the answers

What type of samples are involved in pharmaceutical analysis?

Pharmaceutical ingredients and biological fluids Signup and view all the answers