How many milliliters of 10 % cocaine HCl are required to make a 500 ml isotonic solution?

Name: Problem 29, Chapter 9: Essential Math and Calculations for Pharmacy Technicians
Uploaded: 2021-05-11T19:53:57-08:00
Duration: 1 min 11 s
Channel: David Collins
Description: How many milliliters of 10 % cocaine HCl are required to make a 500 ml isotonic solution?

step 1 This question is a single dilution calculation. To carry out this calculation, we need to use th

How many milliliters of 10 % cocaine HCl are required to...

Key Concepts

Solution Preparation Calculations

Calculations for preparing a solution involve determining the precise volume of a concentrated stock solution needed to obtain a target concentration and total volume. This process ensures that the final mixture meets specific requirements, such as isotonicity and potency, by accurately transferring the necessary amount of solute into a diluent.

Dilution Principles

The principle of dilution relies on the conservation of the amount of solute when a solution is concentrated or diluted. The basic dilution equation, often written as C1×V1 = C2×V2, allows one to calculate the required volume of a stock solution to achieve a desired concentration in a new volume by balancing the solute content.

Isotonic Solutions

An isotonic solution has the same osmotic pressure as another solution, typically body fluids, which is essential in medical applications to prevent cell lysis or crenation when the solution interacts with biological tissues. Understanding isotonicity involves recognizing the need to match salt (or solute) concentrations to maintain osmotic balance.

Percentage Concentration

Percentage concentrations indicate how much solute is present in 100 units of the final solution, often expressed as weight/volume. This concept is crucial for accurately interpreting and preparing solutions where a specific amount of solute per volume is necessary to achieve desired physical or chemical properties.

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