How Many 200 mg Tablets Are Needed for a 2% Solution in a 3 oz Bottle?

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Discussion Overview

The discussion revolves around calculating the number of 200 mg tablets needed to create a 2% solution in a 3 oz bottle of water. Participants explore the conversion between mass and volume measurements, as well as the necessary calculations to achieve the desired concentration.

Discussion Character

  • Mathematical reasoning
  • Technical explanation

Main Points Raised

  • One participant suggests converting the volume of water from ounces to grams to simplify the calculation, while keeping the tablet measurements in milligrams.
  • Another participant provides a calculation indicating that 100 tablets would yield a 20-gram solution, which corresponds to a 2% concentration when compared to 1000 grams of water.
  • The same participant calculates that for 3 oz (approximately 88.5 ml), about 8.85 tablets would be needed to achieve the 2% solution.
  • Some participants express uncertainty about the calculations and seek confirmation or further assistance.

Areas of Agreement / Disagreement

There is no consensus on the calculation process, as participants present different approaches and some express confusion about the math involved.

Contextual Notes

Participants have not resolved the conversion between volume and mass, and the calculations depend on the accuracy of unit conversions and assumptions about the density of the solution.

Rich_E2
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Hello, I need your help on a calculation...

I have 200 milligram dissolvable tablets, and a 3 ounce dropper bottle of water. How many tablets would I need to add to the water to make a 2% solution?

The chemistry/math is a bit confusing to me because the tables are measured in mass (i.e. mg), whereas water is measured in volume (i.e. oz.).

Thanks in advance for your help

-Rich
 
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It would help if you had everything in the same systems of units...leave your tablets in milligrams but convert your bottle of water from ounces into grams (or milligrams)...things should then get easier
 
I'm terrible at math.

Does anyone know the answer?

Thanks.
 
one liter of water contains 1000 grams = 1000 ml
one 200 milligram tablet = .2 grams
so 100 tablets = 20 grams
20g/1000g = 2% solution

3 oz = 88.5 ml
so x / 88.5 = 100 / 1000
so you add 8.85 ( 200 mg ) tablets / 3 oz water = 2% solution
 
Last edited:

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