Liquid Testing

Liquid Testing

Focus Question: Which unknown will have a reaction?

Hypothesis/Prediction:

I believe that most of the substances will change colors or even the texture of the substances will change. If the chemical reacts with the substance than that means that either the color and or texture of the substances will change. Some substances may dissolve because the chemical that is added has broken down the substance.

Materials:

Iodine

Vinegar

Cabbage Juice

Petri dishes (5 per group)

Droppers to add liquid

Stir sticks to mix the liquid with the chemical

Planning: We started by pouring each chemical in small amounts onto the substances one at a time. We gave each chemical a little time to react with the unknown. We will conduct this experiment with each unknown, repeating the same process of adding a little of the chemical to each substance one at a time. Over time we would watch how the chemicals reacted with the substance.

Data:

Predictions in are written in RED/ results are written in black

Colors:	Iodine	Vinegar:	Cabbage Juice:
Red	The chemical will change colors because of the iodine. The unknown substance texture remained the same but the color of the unknown changed into a dark or burnt orange. The sugar changed quickly after being mixed.	Vinegar may also change the texture as well as the smell. Red is not dissolving, red turns into a smooth texture that is almost like a bubble.  The two mix and you can no longer tell well the vinegar was mixed. Clear and Crystal	Cabbage Juice will change the consistency of the substance and possibly make it more liquefied. The cabbage juice liquefied the substance as we stated in our prediction but the color did not change. Odor Change
Yellow	I think iodine will change the color of the chemical because of the color of iodine The yellow substance soaked up the Iodine fast and quickly. The bottom of the unknown which was the most saturated changed to black while the top or lease saturated only changed to the burnt orange like the Red substance.	Vinegar may change the texture as well as the smell. Vinegar may also change the thickness. Yellow is more of paste and it almost turns into a paste type texture or something that is something  that is like glue. The substance Foamed and Gritty.	Cabbage juice will change the texture and cause the substance to be more liquefied because cabbage juice is a thinner substance. The substance liquefied for this one as well but the actually color did not change for this one either. Certain pieces clumped but still liquefied. Sticky and Odor Change.
Green	Iodine will change the color because of the color of iodine. Iodine is colored therefore the substance may change colors. The green substance changed quickly with the Iodine; and the texture of the substance changed once it became saturated. As the substance became saturated, the more texture of the substance begin to clump together.	Vinegar may change the texture as well as the smell of course. Vinegar may also thicken the substance more than water did, depending on the type of vinegar. Green is almost like a pancake batter; and it doesn’t seem fully mixed; and I am not sure if enough liquid was not added or if the substance just don’t not mix together. However no color change with the green.	Cabbage Juice will change the texture because Cabbage Juice is  a thin substance. The green turned into somewhat of a paint like substance and the two objects dissolved together well and the green dissolved together with the cabbage juice./ should have turned a deep purple.
Blue	This chemical will change the color of the substance because iodine can dye substances. The blue reacted to the iodine by soaking up the color and turning into a light orange or even a dark yellow; but the actually texture of the substance did not change. Certain pieces of the blue seemed to separate from one another. While the colored pieces begin to seat on top of the rest of the unkown.	Vinegar may also thicken the substance based on the type of vinegar because some vinegars are thicker than others. Blue turns into a thicker substance but at the same time the unknown seems to be sitting on top of the vinegar but yet not mixing thoroughly. The vinegar seems to be sitting on the bottom of the unknown.	Cabbage Juice may change the texture and also make the substance thinner. The texture of the substance changed, color remained the same, because of the introduction of the unknown, the texture changed and certain parts of the substance became more liquefied./ should of turned somewhat green.
Orange	The chemical will change the color of the substance because iodine can dye substances. Orange was the only substance that turned into black fully from the introduction of the Iodine. The substance didn’t seem to texture; but it did change color. Note the longer it set the more the texture begin to change.	Vinegar may also thicken the substance based on the type of vinegar because some vinegars are thicker than others. Orange seems to be clumpy and the substance did not mix well with the unknown. The vinegar was added and even extra but the unknown seemed to soak up the vinegar within itself instead of mixing with the substance well.	Cabbage Juice may change the texture and also make the substance thinner. The substance became thinner while certain pieces of the unknown however clumped together instead of changing.

Claim/ Evidence: We found that liquid chemicals can cause our unknowns to change color, shape, and texture. We also found that some chemicals seemed not to react at all. We claimed that some substance may dissolve due to the reaction; but we found that not to be true. We claimed that that the texture of the unknown may affect the way in which it reacts. That statement was true because some of the unknowns clumped together, while others did not. We also claimed that time would change the texture even more. That statement was true because by the end of testing, some of the previous unknowns looked different from the start of the experiment.

Conclusion/Reflection: This experiment leaves me to wonder if time is the most important factor in testing reactions. I say this because I wonder if the unknowns and the chemicals were left over night, would they take on a different form? I also wonder if human error effects the reaction? The reason I say this is because some unknowns received more of a chemical than others. Does human error manipulate the experiment? Also I wonder if heat and light have something to do with the experiment. Could the temperature in the room affect what reactions take place?