Introduction Our Laboratory project was conducted in order to determine the phosphate concentration present in three brands of colas in the form of phosphoric acid. The concentration of phosphate in colas is important due to its ability to sooth an upset stomach, but also block absorption of calcium and lead to Osteoporosis. In the first phase of our investigation, we analyzed a series of colored solutions using a Spectronic 20. The second phase of our experimentation …
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showed last 75 words of 448 total
…up on the calibration curve. These results can be reviewed on table three and graph 3.B for details. M1V1=M2V2 Solution Stoicheometry Required Stock A Permanganate Stock 1.25 ml KMNO4. 0.0003 M 3 ml Stock 0.0005 M 5 ml Stock 0.0007 M 7 ml Stock 0.0009 M 9 ml Stock B Cola Stock 1.24 ml KH2PO4 1 x 10-3 M 2 ml Stock 1 x 10-4 M 0.2 ml Stock 5 x 10-4 M 1 ml Stock 1 x 10-5 M 0.02 ml Stock 9 x 10-5 M V1=0.18 ml Stock