mp4p3Group+4

our group is marcus miranda mason and mickala mixing chemicals experiment

Dependent Variable: Signs of a chemical reaction
=__ Background Information: __= Bromothymol Blue : Is a chemical indicator for weak bases and acids. It is often used in pools and fish tanks to indicate and measure the pH level. It is also used in a laboratory for a slide stain.

Water : Not harmful to get on skin or consume. Has many uses such as keeping us alive if we dont have water we will become de-hydrated and get sick and eventually die without proper treatment.

Sodium Bicarbonate : Also known as baking soda. It is used in baking it makes the batter expand which makes the thing your cooking rise.

Calcium Chloride: A salt used to prevent ice and dust on roads. It is also used in refrigerator plants. =__Observations:__= __ -NaHCo3 +CaCl2 __ ~__observations:__ *NOTHING happened __ -NaHCo3+CaCl2+H2O __ ~__observations:__ *temperature raised 1.4 degreese celsius *fizzing *bubbles *particles setling out eventually *opaque __ BB + CaCl2 __ __~observations:__ *temp. goes up 3.8 degrees celsius __ BB+NaHCo3 __ __ ~ observations: __ * temp. went down *the chemicals mixed __ Water + CaCl2 __ __ ~observation: __ -turned white after it was mixed __ BB+CaCl2 __ __ observations: __ -a green and white foam apears also there is rapid changes and also there is fizzing. -temp. does not change
 * the test tube gets hotter telling us that there is a exothermic reaction

=__Pictures of the Lab __=

Summary

In our lab experiment, we worked together with the different equations. As we worked with each equation we found that 2 out of the 7 equations had no reactions. The first one that had a chemical change was BB+NaHCO3 and the water was clear blue, starting temp was 22.2 and ending temp dropped. The next chemical reaction was H20+NaHCO3+CaCl2 and it chemical turned white and fizzled and bubbled. The starting temp. was 21.9 and ending temp. 21.4. The next one is H20+CaCl2 and it turned white, you can see particles and cloudy. Starting temp. was 17 and ending temp. was 28. When we mixed the chemicals the temp went up. The next chemical is BB+CaCl2+NaHCo3 and turned green and yellow, bubbled over. Starting temp. was 25 and ending temp. was 23.3 and it dropped. The next chemical is BB+CaCl2 and it turned the test tube warm.

Conclusion

In this lab we found that NaHCo3+CaCL2+H2O, BB+CaCL2, BB+NaHCo3, H2O+CaCL2, and BB+CaCL2 all had reacted once they were put together. The NaHCo3+CaCL2+H2 started fizzing, bubbles came to the surface, particles later settled out, it became opaque, and it also had a temperature change of 1.4 degrees Celsius. The BB+CaCL2 caused the test tube to get hotter which told us that there was an exothermic reaction. There was also a temperature change of 3.8 degrees Celsius. BB+NaHCo3’s temperature went down and the chemicals became mixed up. The H2O had turned white after it was mixed together. Lastly, BB+CaCL2 had a green and white foam appear once combined. There had also appeared to be a raid changes as to fizzing and some bubbles forming in it. Yet the temperature did not change at all. The only one that did not have any changes at all was NaHCo3+CaCL2.