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Questions and Answers
What is the specific gravity of Hydrochloric acid?
What is the specific gravity of Hydrochloric acid?
Which specific gravity corresponds to Glycerin?
Which specific gravity corresponds to Glycerin?
Which of the following has the highest specific gravity?
Which of the following has the highest specific gravity?
Identify the specific gravity of Olive oil.
Identify the specific gravity of Olive oil.
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Which agent has a specific gravity closest to that of Water?
Which agent has a specific gravity closest to that of Water?
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Which of the following agents has a specific gravity less than 0.80?
Which of the following agents has a specific gravity less than 0.80?
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Which substance has the second highest specific gravity among those listed?
Which substance has the second highest specific gravity among those listed?
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Which agent is most likely to float on water due to its specific gravity?
Which agent is most likely to float on water due to its specific gravity?
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What is the specific gravity of Propylene glycol?
What is the specific gravity of Propylene glycol?
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Which of the following agents has a specific gravity greater than that of Olive oil?
Which of the following agents has a specific gravity greater than that of Olive oil?
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Which of the following liquids has a specific gravity closest to 1.00?
Which of the following liquids has a specific gravity closest to 1.00?
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Identify the agent with the highest specific gravity from the given options.
Identify the agent with the highest specific gravity from the given options.
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Study Notes
Specific Gravity
- Specific gravity (SP GR) is a measure of the density of a substance relative to the density of water at 4°C.
- A substance with a specific gravity of 1.0 is as dense as water, a substance with a SP GR of 2.0 is twice as dense as water.
- Specific gravity is a useful tool for pharmacists in the preparation and dispensing of medications, particularly when dealing with liquids
- The SP GR of a liquid is dependent on its temperature
- The table above shows the specific gravities of a range of pharmaceutical agents at 25°C.
- Ether has the lowest specific gravity of 0.71, while mercury has the highest specific gravity of 13.6.
- Note that ether's SP GR is given at 20°C.
Specific Gravity
- Specific gravity is the ratio of the density of a substance to the density of a reference substance, usually water at 4°C.
- It is a unitless quantity.
- The specific gravity given in the table is for 25°C, except for ether, which is at 20°C.
- Values in the table can be used for calculations involving volume, mass, and concentration.
- For example, you can determine the weight of a volume of liquid by multiplying the volume by the specific gravity.
Specific Gravity Applications
- Specific gravity is used in a variety of pharmaceutical calculations, such as:
- Calculating the amount of a substance needed to make a solution.
- Determining the concentration of a solution.
- Calculating the volume of a substance needed to make a suspension.
- Specific Gravity is a critical factor in formulation development and quality control in the pharmaceutical industry.
Specific Gravity and Its Impact on Formulations
- Specific gravity impacts the stability, appearance, and delivery of pharmaceutical formulations.
- This includes suspensions, emulsions, and other dosage forms.
- For instance, specific gravity considerations are essential in making suspensions where the solid particles need to stay evenly dispersed.
- This ensures consistent and predictable doses.
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Description
This quiz explores the concept of specific gravity and its significance in the pharmaceutical field. Understand how specific gravity relates to the density of substances and its implications for medication preparation. Test your knowledge of specific gravities for various pharmaceutical agents.
