Labpaq ionic reactions

For an exact listing of materials, refer to the Contents List form included in the LabPaq. Aqueous solutions are those solutions in which water is the solvent. Water, because of its high polarity, is an especially good solvent for ionic substances.

Labpaq ionic reactions

The reactions were analyzed under white and black paper for backgrounds. Well A1 showed a clear color with bubbles forming carbon dioxide.

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Well A2 showed an orange color and well A3 formed a dark blue color. After previous mixtures, it seems that when BTB Bromothymol blue is mixed with an acid, it turns into an orange color and when mixed with a base it forms a dark blue color.

Well A4 formed a green color, where the white paper showed a lighter green and the black paper appeared with a darker green. The mixture in well A5 showed a blue color.

Then 1 drop of HCl added turned the mixture into a blue-greenish color, with a greater emphasis on green. Wells A6 showed a yellowish, cloudy precipitate and A7 formed a dark pink color. The color observed in well A8 was a clear homogeneous mixture. It appears that when phenolphthalein is mixed with an acid, the mixture remains clear and when mixed with a base, it forms pink.

Wells A9 mixture formed a light, brownish precipitate and A10 remained clear. Nevertheless, when mixture A10 was absorbed into a piece of paper towel, the clear color changed to a light brown spot after exposure to a light bulb for an hour.

The last mixture A11 formed a light blue precipitate. Suppose a household product label says it contains sodium hydrogen carbonate sodium bicarbonate.

How would you test this material for the presence of sodium bicarbonate? I would test it with different chemicals in separate well-plates to see if there is a reaction the same way Table 1 shows. A well may have HCl mixed with sodium bicarbonate and record whether the mixture forms any clear bubbles, any sign of strong odor.

It could also be tested with phenolphthalein to see if a change occurs, forming a dark pink color or staying clear. You know what color phenolphthalein and bromothymol blue turn when testing an acid or a base. Use the empty pipet in the Auxiliary Supplies Bag to test several at least 3 household items including household cleaning products with bromothymol blue.

Rinse the pipet well before using it on the next household chemical. When finished with this experiment rinse the pipet well and return it to the Auxiliary Bag for use in future experiments. Name the items tested and record their results.

What do these results mean? Windex originalLysol, and All-purpose Cleaner. Lysol mixed with BTB formed bubbles with an opaque green color. Windex mixed with BTB showed a dark blue color.

These results mean that Windex and All-purpose Cleaner are bases and Lysol is an acid. You found a sample of a solution that has a faint odor resembling vinegar. You are verifying that it is indeed vinegar and you add a few drops of phenolphthalein.

The sample turns pink. What assumption can you make about this sample? Vinegar is an acid. Phenolphthalein only forms a pink color when it is mixed with a a base.

This means that the sample of solution is not vinegar. You decided to investigate if the new wave of Vitamin Water is pH neutral: Of the two remaining, one turns slightly yellow, while one remains blue.

When Bromthymol Blue is mixed with an acid it will turn orange-yellowish and when mixed with a base will form a blue color.

Labpaq ionic reactions

I can assume that the Vitamin Water that remained blue is more towards a base than an acid. The Vitamin Water that turned yellow is more towards an acid than a base.Net ionic equations are useful in that they show only those chemical species participating in a chemical reaction.

Course Summary:

The key to being able to write net ionic equations is the ability to recognize monoatomic and polyatomic ions, and the solubility rules. Free Essays on Ionic Reactions Lab for students. Use our papers to help you with yours 1 - Jan 29,  · Title: Observations of Chemical Change Purpose: To observe the basic properties of chemical reactions and associate those properties with common items found in the home.

Procedure: I mixed different chemicals in my Well Plate in order to determine whether they were a base or acid and how to determine those chemical properties.

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Labpaq ionic reactions

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