Tina Tosh Tutors Ass Fucking
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JMac has a problem. He's trying to get tutored in science by Ms. Tosh, but he doesn't know what the heck she's talking about. What he does know is that Ms. Tosh is wearing a sheer, purple top and, as it turns out, no panties. He can't concentrate, and she wonders why. 'Look at what you're wearing,' he says. 'You're not wearing any panties.' 'I think you do know this stuff,' Tina says, 'and I think you've been coming here for other reasons. Read more at ANALQTS.COM.
Video Transcription
Okay, dilution.
The aim of dilution is to show how to calculate the concentration of a solution made by diluting
a stock solution.
To save time and add space in the laboratory, solutions that are routinely used are often
purchased or prepared in concentrated form called stock solutions.
