Pharmacy Calculations|Alligation Method Makes Calculating Specific Gravity of Liquid Mixtures Easy

[@joycekulukwenda4966]

Wow!! For the first time understanding this topic. Thanks alot

[@PharmaceuticalCalculationsEasy]

Glad the video was helpful. Thank you Joyce for watching and for the comment.

[@ahmadfares5243]

Very good 👍 👏

[@jefersongueiros7414]

Great job, congratulations !!! Grain...

[@PharmaceuticalCalculationsEasy]

Thank you Jeferson for the kind words and for being an active member of the community.

[@philipraphael3676]

Thanks for the video....

[@PharmaceuticalCalculationsEasy]

You are welcome Philip. Thank you for watching and for continuously supporting the channel.

[@olubunmiflorencelucas805]

Thank you 😊

[@PharmaceuticalCalculationsEasy]

You're welcome 😊. Thank you Olubunmi for watching and for being a part of the community.

[@agusta6587]

Hello Professor. Can you pls reword this problem, Ty? Dimethyl Sulfoxide Liquid is supplied as a 50% weight/weight solution with a specific gravity of 1.40. What is the percent weight/volume of liquid dimethyl sulfoxide?

[@stephenmazimba7134]

If fifty glycerin suppositories are made from the following formula, how many milliliters of glycerin, having a specific gravity of 1,25, would be used in the preparation of 96 suppositories? Glycerin 91 g 9 g Sodium stearate 5 g Purified water

[@PharmaceuticalCalculationsEasy]

Thank you for the question Stephen. It appears the question did not transcribe properly when copied over. It is difficult to tell the quantities for some of the ingredients.

[@SP-ue3nq]

I want to clarify on the last question. Why the total parts were added 0.225 and 0.06? How come in the ratio we did not do 500 g x 0.06/0.225

[@PharmaceuticalCalculationsEasy]

In the question, the goal is to make 500 grams of the sorbitol solution. This is the total quantity. Hence, the number of parts that represents the 500 grams will be the total parts. Since 0.06 is the number of parts of water and the 0.225 is the number of parts is the sorbitol solution having a specific gravity of 1.285, we add both numbers to get the total parts which is 0.285. Hope this helps. Thank you Sareena for watching and for the comment.

[@stephenmazimba7134]

Help me with this question.

[@PharmaceuticalCalculationsEasy]

Thank you Stephen for watching and for the comment.

[@mariafedaguan6644]

Help😭 why did we still have to determine the volume of ppg when the volume (1pt = 473ml) was already given?

[@PharmaceuticalCalculationsEasy]

Thank you Maria for watching and for the comment. Regarding your question, the pharmacist starts out with 1 pint of ppg (specific gravity = 1.20) which is diluted with 500 ml of water (specific gravity = 1). At this point the specific gravity of the resulting solution is about 1.10. However, the goal is to end up with a solution having a specific gravity of 1.15. Hence, you need to add more ppg to increase the specific gravity of the solution. That is why we still need to precisely determine the volume of the ppg that needs to be added. Hope this helps.

[@shairamaelanticse5677]

I want to clarify the first question, the answer in the textbook is 1031.38 mL how come you come up with different answer

[@PharmaceuticalCalculationsEasy]

Thank you Shaira for watching and for the comment. It is likely the answer in the book is incorrect. Here is an alternative way to solve the question and it gives the same answer as the alligation method. jo.my/b6exmh

[@stephenmazimba7134]

Calculate the number of milliliters of polysorbate 80 required to prepare 48 100-g tubes of the following formula for a progesterone vaginal cream. Progesterone, micronized Polysorbate 80 3g 1 g Methylcellulose 2% Gel 96 g

[@PharmaceuticalCalculationsEasy]

Thank you for the question Stephen. It appears the question did not transcribe properly when copied over. It is difficult to tell the quantities for some of the ingredients.