Chemistry, 24.11.2020 06:20, davidrodriguez122001

Chemical Reactions Lab – Observations and Conclusion Observations

1. Which base products did you use in your experiment?
Base 1:
Base 2:

2. What happened when you added the Phenolphthalein to your base? What color were the base and the solution before and after mixing?
Base 1:

Base 2:

3. Record the starting mass, volume, and description (state of matter, color, general appearance) of your base here:
Base 1 mass:
Base 1 volume:
Base 1 description:

Base 2 mass:
Base 2 volume:
Base 2 description:

4. Record the starting mass, volume, and description (state of matter, color, general appearance) of your acid here:
Trial 1 mass:
Trail 1 volume:
Description:

Trial 2 mass:
Trial 2 volume:
5. What happened when you allowed the two chemicals to mix? Include any observations such as a decrease or increase in temperature, a change in color, bubbling or fizzing, production of a precipitate, or a change in the volume of the bag.
Reaction 1:

Reaction 2:

6. Record the final mass and a description of the products of the mixture here:
Mass:
Description:

Conclusion Questions
1. Did a chemical reaction occur when you mixed your two chemicals in each of your experiments? Use specific evidence from your observations before, during, and after experiment to support your answer – remember the signs of a chemical change.

2. Some of the bases you may have used are baking soda (NaHCO3 – sodium bicarbonate), antiacid (CaCO3 – calcium carbonate), lime (CaO or CaO2H2 – calcium oxide or calcium hydroxide), window cleaner (NOH5 – ammonium hydroxide), or soap (KOH or NaOH – potassium hydroxide or sodium hydroxide). Which of the chemical equations below represent the two reactions you observed, and what were the reactants and products you saw for each?
a. HCl + NaHCO3 → H2O + NaCl + CO2
b. 2HCl + CaCO3 → H2O + CaCl2 + CO2
c. 2HCl + (CaO or CaO2H2) → (1 or 2)H2O + CaCl2
d. HCl + NOH5 → H2O + NH4Cl
e. HCl + (KOH or NaOH) →H2O + (KCl or NaCL)
Reactants and products:

3. Were each of your reactions (if you observed a reaction occurred) endothermic (requiring energy), exothermic (releasing energy), or neither? Use specific evidence from your observations to support your answer.

4. Compare the mass of your reactants with the mass of your products. Do your experiments support the idea of conservation of mass? Why or why not?

5. How were the two reactions (or non-reactions) that you observed similar, and how were they different? Compare the reactants, products, and what you observed when you mixed them. Which required or produced more energy?

plz help with this because my dad is gonna beat my if i don't get this done plz help i beg you T-T

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answered: Guest

when—without warning—something provokes your anger, you may struggle not to succumb to it. since what typically makes you mad is feeling powerless in the face of what seems unfair, your anger is mostly an attempt at a “quick fix” to right the balance. it’s as though you’re raising a fist in protest, proclaiming that you’re not going to capitulate to such injustice.

there are, however, a multitude of problems related to this immediate, push-back reaction of anger. and probably the key one is that almost never does it resolve the issue that gave rise to it. such reactive anger is probably best understood as self-defeating. as david burns, the author of the seminal self- book feeling good, observes: if realistically, acting on your anger is to make any sense, it needs to meet two criteria—which, in almost every case, is frankly impossible. that is, your anger must:

be directed toward a person who has intentionally (and needlessly) behaved in a hurtful way toward you; and

be beneficial or advantageous to you (i.e., assist you in achieving a desired goal).

i think you’ll agree that only rarely can you claim that your anger is both warranted and , whether to yourself or the relationship.

so let me offer you a two-step alternative to abandoning your better judgment and giving in to the temptation of anger—one that should neutralize your anger in seconds. or, when you’re really angry, in minutes.

but keep in mind that you must really want to execute these steps, be sufficiently motivated to perform them. which means overcoming more unconscious resistance than you might ever have imagined. because there are many immediate “advantages” of anger that can interfere with your resolve, i’ll suggest a few of them that might interfere with your employing this powerful method to rid yourself of counter-productive anger.

explanation:

answered: Guest

7is b8 is d9 is c10 is a11 is d