Showing off My first steroid brew without hot plate, magnetic stirrer, bottle top filter - MAST P

[lovedajuice]

@AllAmericanRoughNeck
Yeah it's pretty easy to find the density of most things. Such as pure sesame oil which is 0.95 g/cm³

Weighing liquids is a great way to get a precise amount of a liquid. On the other hand when making a solution it's not very helpful unless you know how the mass of the solute will impact the volume of the solution as it is dissolved.

When one adds a solute to a solvent, there is often a change in the average distance between the solvent molecules. This change is not easy to predict, and may be considerable depending on the nature of both solute and solvent.

Let's say you want 100 mL of 250mg/mL test cyp. Even though the density of test cyp is 1.1±0.1 g/cm^3, the volume of the solution will not increase by 1cm^3 per 1.1g when the solute goes into solution.

So adding the correct amount of ba, bb, and 25.0g of test cyp then adding the requisite oil in a calibrated graduated cylinder until in reaches 100ml you'll get pretty fucking close to spec.

If you wanted to do this in a lab you could repeat this process 10 times while logging the masses of all of the components of the solution so you could calculate the mean relationship between solute and solvent. This would be great to know if you wanted to expand to brewing liters.

Yeah provided all the densities stay the same you could calculate that, but densities are not always the same especially if there are impurities in whatever compound you are trying to measure and then there is a bigger margin for error because you don't usually measure say 100ml of oil and add the powder to it, you add the powder and top it off until it's 100ml in a calibrated volumetric flask, otherwise concentration would be different, in my opinion using a scale overcomplicates things, introduces a margin of error and makes it almost impossible to do some measurements that are volume based and not weight based.

 

[bigrobbie]

Once you do it, it becomes pretty fun actually