In Part I the reaction you observed was Mg(OH)2 (s) ↔ Mg2+ (aq) + 2 OH- (aq). Compare the colors you observed in the experiment and answer these questions: Which way should the equilibrium shift when HCl is added? How do your results support your answer? It should shift toward the reactants. It is shown by removing the pink color from the product.
Once calculated, these results can be analyzed and will either validate or refute my hypothesis. Introduction (Library Research): Ascorbic acid (vitamin C) is found in orange juice. In this experiment, orange juice made from the concentrate was measured for decreases/increases of off-flavours (furfural and α-terpineol) and for decreases/increases of ascorbic acid. Sodium hydroxide (NaOH) as well as hydrochloric acid (HCl) were added during separate trials to change the PH in the orange juice. An increase of PH from 3.2 to 4.2 enabled the protection of ascorbic acid levels, without increasing the levels of other enzymes.
Make a decision whether to discard the null theory. To do this the Z score must be compared to the cutoff sample score which was found out in step 3. 14. Based on the information given for each of the following studies, decide whether to reject the null theory. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null theory should be turned down, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion.
Put HCl in a burette and place the beaker underneath, slowly begin to drop the HCl into the first beaker until it turns green. If it turns yellow it is overtitrated and the experiment will have to be restarted. Then place the beaker on a burner and heat to evaporate all of the CO2, when the solution is a blue color take it off and let cool. Titrate the solution again with the HCL, this time the solution should turn yellow. Place the solution on the burner again and wait until all of the H2O has evaporated leaving only NaCl residue.
Trying to explain how the genes of an individual will affect one's personality. Using the humanistic and biological theories to best describes my personality. Flip a Coin Myers' Briggs Personality Tests Flip a coin Myers' Briggs Personality Tests completed on team members Joann and Raymond. I will be comparing and contrasting each person using biological and humanistic approaches of personality. Explain two characteristics from the biological and humanistic approach that I agree, disagree, and why.
After this I put two drops of HCl into well H1 and added two drops of phenolphthalein, and observed. Next I put two drops of NaOH into well A2 and then added two drops of AgNO3 and then observed. Then I put two drops of AgNO3 into well B2 and then added two drops of NH3. Finally I put two drops of NH3 into well C2, and then added two drops of CuSO4 and observed. Observations and Results Data Table 1: Reactions Expected | | | | | | | Well # | Chemicals | Reactions | | | | | | | A1 | NaHCO3 and HCl | Bubbled up.
Be sure to explicitly reveal the position of both product groups. b. Is there anything Voltamp could or should have done to prevent the competitive disagreement, or, is it only logical that decentralized (SBU’s) will have such problems? Is internal competition a good thing? Explain.
These reactions are in the general form: AB + CD → AD + CB Reactions between cations and anions will be examined in this experiment. The resulting precipitate is indicative of the reaction that occurred. In our experiment, a lead nitrate solution, Pb(NO3)2, will be mixed with a solution of potassium chromate, K2CrO4. A yellow precipitate will form. This precipitate must be a combination of the K + or Pb 2+ cation and the CrO4 2- or NO3 2- anion.
This is the equation of the reaction. (Clear) (Clear) (Soluble) (Gas) (Yellow precipitate) (Clear) (Clear) (Soluble) (Gas) (Yellow precipitate) Sodium thiosulphate + hydrochloric acid → sodium chloride+ sulphur dioxide + water + sulphur This makes the solution go cloudy This makes the solution go cloudy Na₂S₂O₃ + 2HCl → 2NaCl + SO₂ + H₂O + S Variables There are different things that we had to control during the experiment to ensure the results were reliable, we had to keep the temperature the same, although this was not 100% accurate because we did it at room temperature and we doubt that this would have changed within the 30 minute experiment time. The X that we were looking at during the experiment had to be the same X on the same piece of paper to eliminate any changes of the X, we also had to make sure the distance we kept between the piece of paper and the person who was looking the same, we did this by leaning our arms on the table and looking vertically down without bending our backs at all. We thought it was best to use the same person so the visual ability to see the X