al textArialBIUA11三I| 1 I | I 2 ..4 ....5 1Color of copper sulfate saltColor of residue saltBefore heating- blueBefore addition of water whiteAfter heating -whiteAfter addition of water blueQuestion 7. When the blue salt is heated in the test tube, water droplets appear at the mouth ofthe test tube. Explain why.Question 8: What evidence did you observe that suggests this reaction is reversible?

The copper sulphate salt has a blue colour.

Question 7. When the blue salt is heated in the test tube, water droplets appear at the mouth of the test tube. Explain why. Question 8: What evidence did you observe that suggests this reaction is reversible?

Question 7. When the blue salt is heated in the test tube, water droplets appear at the mouth of the test tube. Explain why. Question 8: What evidence did you observe that suggests this reaction is reversible?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Propose a double displacement reaction that could be performed to create Mercury (II) oxide precipitate from two soluble compounds. Include formulas, balance, and states.
An unknown solution shows the following observations. State whether each is a positive or negative test result. (Insert Image) What are the ions present in the solution?
Classify each of these reactions. Ba(CIO, ), BaCl, + 3 0, CaO + CO, → CaCO, single replacement combination O double replacement single replacement decomposition double replacement combination decomposition NANO, +HCI → NaCl + HNO, ZNSO,+Mg → Zn + MgSO, combination double replacement decomposition single replacement double replacement combination single replacement decomposition
Write observation and the complete molecular equation for each reaction. Identify the precipitant using the solubility chart. B1: Phenolphthalein is pink in presence of NaOH. It will become colorless as HCL is added. Some color can be felt. Observation: Equation: B2: Gas bubbles will evolve from the test tube when solid Na2CO3 is added to HCL. Observation: Equation
6.
Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 87.What is the use of barium hydroxide in the precipitation of standard NaOH solution? a. catalyst b. preservative C. precipitate any carbonate in present in solution d. prevent the reaction of NaOH with carbonate 88. The general inspection levels on the right-hand side of the master table are the ones to be used in most sampling cases. Unless otherwise specified, Inspection level should be used a. I C. III b. IV d. II 89.33.5ml of 0.9998N NaOH was used in the titration of 50ml HCI solution. Calculate the normality. a. 0.6969N C. 0.6779N b. 0.6689N d. 0.6699N
Which of the following statement is FALSE regarding solubility rule? a. All nitrates are soluble, except for alkali and alkaline earth metals b. All halides are soluble, except with silver and lead C. Silver and lead ions are mostly insoluble, except when paired with nitrates d. Hydroxides are mostly insoluble, except when paired with alkali metals
19. Which one of the following compounds is insoluble in water? Seléct one: a. Magnesium iodide b. Nickel(II) perchlorate hexahydrate c. Calcium sulfate d. Potassium acetate e. Ammonium chromate
Enter a molecular equation for the reaction of dilute sulfuric acid with iron. (Assume that sulfuric acid acts as a diprotic acid and that an iron(II) compound is formed.) Express your answer as a balanced chemical equation. Identify all of the phases in your answer. Enter a molecular equation for the reaction of hydrobromic acid with magnesium. Express your answer as a balanced chemical equation. Identify all of the phases in your answer. Enter a molecular equation for the reaction of acetic acid, CH3COOHCH3COOH, with zinc. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
5. The Haber process is the name we give to the industrial production of Ammonia Salt Sodium Hydroxide Soap
27) The cycle of copper reactions illustrates important principles of chemical reactions. The cycle begins with elemental copper, which in a first reaction is oxidized to copper(II) cation. Copper(II) is then carried through different solid forms. In the last step, copper(II) cation is reduced, the copper metal is regenerated, and the cycle is closed. The five key steps are (see attached picture). Assume that you want to carry out a sequence of cycle reactions. b) What volume of 16M HNO3 solution provides the required amount of the acid?
Part IV Cabbage Juice Indicator Chop cabbage into small pieces until you have about 2 cups of chopped cabbage. Boil for at least ten minutes to allow time for the color to leach out of the cabbage. Allow it to cool for 15 min • Filter out the plant material to obtain a red-purple-bluish colored liquid. 1. Add 1-2 drops of cabbage juice into a small bowl 2. Add 3-5 drops of vinegar into the bowl with the cabbage juice 3. Observe Is this a chemical change or physical change? Explain? Store the excess cabbage juice in your refrigerator, you will need them for future experiments.