25. Qualitative tests identify the presence or absence of a specific substance in a sample. Quantitate tests determine the quantity of a specific substance present in a sample.
26. A confirming test positivley confirms that a certain ion is present.
27.
a) I used a reference solution because a reference solution is used for comparison.
b)I used distilled water in the blank because it is unknown if it contains ions
28. Yes; iron is present because the test was positive.
29. Personally, I would test out the Tyndall effect and try to pass light through the water.
30. Since medicine is typically a colloid, it needs to be shaken before you drink it so you can put all the proper elements in the medicine into your body instead of just the top layer of the medicine.
31. It is useful for element symbols to have international acceptance so that the periodic table can be read by everyone.
32.
33. It is impossible for water to be completley free of chemicals because some gasses will always dissolve in water to some extent.
34. H20 is a liquid made of Oxygen and Hydrogen gasses and when put together they make a liquid (at room temperature).
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