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- Shana, a student in the Analytical Chemistry class, performed a Redox Titration to determine the content of hypochlorite ions (% w/w) in an unknown solution. First, Shana prepared a primary standard solution of KIO3 by dissolving 0.4791 g dry KIO3 in 250.00 mL DI water. Next, using the procedure in your lab manual, Shana used 50.00 mL of this primary standard solution to standardize the Na2S2O3 titrant, and 26.25 mL of titrant was consumed. Next, Shana prepared the unknown solution by diluting 12.8624 g of the solution in 250.00 mL of DI water. A 50.00 mL portion of this dilute unknown solution was titrated using the procedure in your lab manual, and 19.25 mL of Na2S2O3 solution was consumed. Answer the following questions about this titration. Recall the stoichiometry of the NET chemical equation for this reaction. Note: use appropriate significant figures in your answer! A. Calculate the concentration (M) of Na2S2O3 titrant. B. Determine the amount (g) of hypochlorite ion in 50.00 mL…THE QUESTION IS AT THE PICTURE... 1 QUESTIONS ONLY.. AND THE GIVEN PROBLEMS IS THE ONE I TYPEDA. Concentration1. Place 3 mL each of 6N, 3N, & 1.5N hydrochloric acid in separate test tubes.2. Drop simultaneously equal lengths (about 1cm) of magnesium ribbon and note thetime it takes for the magnesium to dissolve in each use.B. Surface Area1. Weigh a small iron nail to the nearest hundredths of a gram and weigh an equalamount of iron fillings.2. Place them in a separate test tubes.3. Add simultaneously 3 mL of 3N hydrochloric acid and compare the rates of reaction.C. Temperature1. Place 5 mL each of 0.1N sodium thiosulfate solution into 5 test tubes.2. Place all five test tubes in the water bath and let it stand for 1 minute.3. Record the temperature of the water bath. Remove the first test tube from thewater bath and place it in the test tube rack.4. Add 1 mL of 0.1M sulfuric acid and stir with a glass rod. Record the time it takes forthe turbidity to appear.5. Increase the…A. Clean and carefully weigh 2 strips of Cu, 2 strips of Fe, and a strip of Zn. Connect 1Cu strip and 1Fe strip together. Place them in a beaker containing salt water. Connect another Fe strip to one end of a Zn wire. Connect the other Cu strip to the other end of the same Cu wire. Place the connected strips in another beaker containing the same concentration of salt water. Set the mixtures aside for a couple of days. Wash the strips. Dry them. Weigh each strip. Determine the gain or loss of mass in each strip. Explain results
- Solid potassium sulfide is slowly added to 150 mL of a 0.277 M nickel(II) iodide solution until the concentration of sulfide ion is 0.0269 M. The percent of nickel ion remaining in solution is %. 20 Submit Answer $ 4 R F M 07 20 Retry Entire Group % 5 [Review Topics] [References] Use the References to access important values if needed for this question. T Cengage Learning Cengage Technical Support G ^ 6 8 more group attempts remaining D MacBook Pro Y H & 7 N U * 00 8 J I M 69 K O ) 0 < A L P A Previous Next Email Instructor { Save and Exit ~4 ? 1Solve all 1. Millining, pulverizing are terminology for -------- process. 2. The Mohs scale hardness for Quartiz is 3. The separation of mineral from gangue is known as 4. There methods of industrial sizing are 5. The jaw crusher compresses rock between two Q2:- Fill in the blank 6. ‒‒‒‒‒‒‒‒ -11-1‒‒‒‒ and ---- it is process used in the metallurgy of copper. ‒‒‒‒‒‒‒‒ and 7. The weight percentage of Al in earth crust is 8. Forces acting on particles are 9. The first step in the hydrometallurgical process is surfaces.3 An analyst weighed 0.5002 g of Apple Leaves Standard Reference Material (SRM#1515) to determine cadmium levels. The digestate was completed to the 25.0358 mL mark with distilled water. to. a. 1Indicate the Cd concentration as it appears on the Certificate of Analysis for this control. b. If the analyst recovered 92.6%, calculate the concentration (in ppb) of Cd in the solution.
- For the reactivity of metals experiment which of the following is a laboratory safety precaution?Please read all the choices before choosing an answer.A. Since you will be working with hydrochloric acid (6M) care must be exercised not to get thisacid on your clothes or skin. If you should come into physical contact with it, wash if off as fast aspossible with copious amounts of water. Then inform your teaching assistant of your spill.B. You must wear goggles in this laboratory.C. Handle your thermometer with care. When you remove it from your drawer be sure to holdboth ends of the thermometer so that it does not slip out.D. No flames of any type will be permitted in the laboratory while this experiment is beingperformed.E. All the answers are correct._ _ _ _ _ _ _ _ Also called as Crushing or pulverizing, it is the process of decreasing the size of the ore. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The density of a mineral is always taken into account in this procedure since it is submerged in a chemical with a different density. _ _ _ _ _ _ _ _ _ A chemical and crushed ore combination will be stirred to generate bubbles that will hold the froth and mineral. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ A strong magnet is used to separate metallic minerals from other undesirable components in this procedure. _ _ _ _ _ _ _ _ These are waste products that result from the milling process. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ A chemical is sprayed in a pile of ores to separate the mineral from the undesirable components in this procedure.The same physical property that helps drive the reaction to completion can also stall out the reaction before it starts. What do we do in the procedure that helps minimize this concern?
- Solve all 1. Millining, pulverizing are terminology for -------- process. 2. The Mohs scale hardness for Quartiz is 3. The separation of mineral from gangue is known as 4. There methods of industrial sizing are 5. The jaw crusher compresses rock between two Q2:- Fill in the blank 6. ‒‒‒‒‒‒‒‒ and ‒‒‒‒‒‒‒‒ ---- it is process used in the metallurgy of copper. and 7. The weight percentage of Al in earth crust is 8. Forces acting on particles are 9. The first step in the hydrometallurgical process is surfaces.ew History Bookmarks Develop Window Help A cvg.cengagenow.com cu Tell Me A Story Video - Chapter 2: Loss | Stream Free [References] Calculate the concentration of all ions present in each of the following solutions of strong electrolytes. a. 0.800 mole of Ca (NO3), in 400.0 mL of solution M MNO, b. 8.5 moles of Na2 SO4 in 6.75 L of solution MNa = ot Mso. M pt c. 5.50 g of NH4 Cl in 600.0 mL of solution pt MNH," pt Mar = d. 3.10 g of K3PO4 in 400.0 mL of solution Mg+ = Mpo,- = Submit Answer Try Another Version 5 item attempts remaining Show Hint ent Cengage Learning Cengage Technical Support tv MacBook Pro1) What do sodium/potassium pumps do with regard to sodium? pump it out of the cell attract sodium to them (since they are negatively charged), keeping sodium outside the cell pump it into the cell attract sodium to them (since they are negatively charged), keeping sodium inside the cell 2) A cup of sugar is dumped into a gallon of hot water. After 30 minutes, we will expect that the process of ________ will ensure that the sugar molecules are evenly distributed throughout the water. diffusion electrostatic pressure gap traversion reverse entropy