Chemistry, 07.06.2020 04:01 mariapowers490
Use the solubility rules from the Lab 4 introduction and your knowledge of qualitative separation schemes from the lab to answer the following questions. The qualitative analysis experiment you did is actually an abbreviated version of a much larger analysis scheme in which many different cations are separated and identified. Suppose a mixture contains Ag+, K+, NH4+, Hg22+, Pb2+, Mg2+, Sr2+, Ba2+, Cu2+, Al3+ and Fe3+.(a) Which of the following ions could you separate, by causing them to precipitate, with the addition of HCl? (Hint: HCl is a source of chloride ions. Select all that apply.)Ag+ K+ NH4+Hg22+ Pb2+ Mg2+Sr2+ Ba2+ Cu2+Al3+ Fe3+ (b) After the addition of HCl, the above sample is centrifuged and decanted. Which of the following cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2SO4? (Hint: H2SO4 is a source of sulfate ions. Select all that apply.)Ag+ K+ NH4+Hg22+ Pb2+ Mg2+Sr2+ Ba2+ Cu2+Al3+ Fe3+ (c) After the addition of H2SO4, the above sample is centrifuged and decanted. Which of the following cations remaining in the supernatant could you separate, by causing them to precipitate, with the addition of H2CO3? (Hint: H2CO3 is a source of HCO3β and carbonate ions. Select all that apply.)Ag+ K+ NH4+Hg22+ Pb2+ Mg2+Sr2+ Ba2+ Cu2+Al3+ Fe3+ (d) Choose one of the cations above and write the net precipitation reaction that occurs. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.)Cu2+(aq) + (CO3)2-(aq) β CuCO3(s)Your answer contains an improperly or incompletely formatted chemical formula. Your answer contains improper superscript or subscript
Answers: 3
Chemistry, 22.06.2019 02:30
When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.
Answers: 3
Chemistry, 22.06.2019 17:30
98 points you will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. before you conduct your experiment, you need to form a hypothesis. a hypothesis is a prediction of what you think will happen in the experiment. the hypothesis is a statement that describes βifβ a certain set of circumstances are present βthenβ there will be a specific result that will occur. record your hypothesis here: record the results from step one of the experiment (dropping the objects in the air): first trial: second trial: third trial: record the results from step two of the experiment (dropping the objects in a vacuum): first trial: second trial: third trial: did the experiment support your hypothesis? using the data from your experiment, describe why you believe your hypothesis was either proven or disproven. what forces were acting on the objects dropped in the air? what force was acting on the objects dropped in the vacuum? part two: comparing forces choose two forces and compare and contrast these forces. you must provide two ways that they are alike and two ways that they are different. you may make a list, write in paragraph form, or make a chart. choose two forces and compare and contrast these forces. these must be different forces than used in the prior question. provide two ways that they are similar and two ways that they are different. you may make a list, write it out, or make a chart.
Answers: 3
Use the solubility rules from the Lab 4 introduction and your knowledge of qualitative separation sc...
Chemistry, 17.10.2019 19:30
Mathematics, 17.10.2019 19:30
Social Studies, 17.10.2019 19:30
Mathematics, 17.10.2019 19:30
Mathematics, 17.10.2019 19:30
Business, 17.10.2019 19:30
Biology, 17.10.2019 19:30
Geography, 17.10.2019 19:30
Mathematics, 17.10.2019 19:30
Social Studies, 17.10.2019 19:30
Physics, 17.10.2019 19:30