Questions about jade study note

【英語ですみません】最後の12番は何を書いたら良いのでしょうか…？ Video C の実験では、aqueous solution にlead(ii) nitrate, aqueous solution にPottasium iodide を入れていました。 2KI (aq)... Read More

With lead (I) nitrate solution. This precipitation reaction produces a bright yellow solid. (point values in parentheses) Part 1: 1. Copy the unbalanced reaction below into your lab notebook. Balance the reaction by adding coefficients. (1) KI (aq) Pb(NO,), (aq) KNO, (aq) Pbl, (s) 2. a) Which trial are you assigned? b) Copy the data table below into your notebook. Watch video A (make sure it's the correct trial!) and collect your data. You may need to pause or rewatch the video, it goes quickly. (1.5) Mass of Empty Beaker (g) Mass of Beaker+ solid Pb(NO,)。(g) Volume of 1.0 M KI (aq) (mL) For the following calculations, show all your work for full credit. 3. What mass of solid Pb(N0,), was added to the beaker? (1) 4. If the solid Pb(NO,), was dissolved in 45 mL of water, what is the molarity of the Pb(NO,)。 solution? (2.5) 5. Which compound is the limiting reactant? (4) 6. What mass of lead (II) iodide (PbL,) should be produced? (2) Part 2: 7. Watch video B (make sure it's the correct trial!) to see the complete reaction and collection of the product. Copy the data table below and record your data. (1) Mass of filter paper (g) Mass of filter paper + dried precipitate (g) 8. What mass of precipitate was collected? Show your work. (1) Calculate the percent yield for the reaction. Show your work. (2) 10. For your trial, which three ions were present in the filtered solution at the end of the reaction? In other words, which three ions are still dissolved at the end of the reaction? Defend/explain your 9. answer. (3) 11. Watch video C - watch both tests for your trial and record your observations. (1) a) Add lead (II) nitrate - b) Add potassium iodide - 12. These tests were conducted to prove the identity of the limiting reactant. Considering your answers to the previous two questions, describe how these tests support the prediction you made in question 5 about which compound is the limiting reactant. (2)

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Chemistry Senior High over 5 yearsago

正極と陽極、負極と陰極に違いはありますか？

Unresolved Answers: 1

Chemistry Senior High over 5 yearsago

【英語ですみません🙇‍♂️】9,10,11,12で、どれがorganized, reduced なのか教えていただきたいです🙏 6,7,8は分かったのですが、下はよく理解できませんでした説明お願いします。。

6. reaction of nitrogen gas with hydrogen 82S 2 NH.(⑧ N@ 3 HH@ グ太 El cxidized N reduced 旧 ineral o7g7coc76) 7. production ofcopper metal fom its sulfide as found in rocks (Cu。S, the miner2 2 SO,⑮ CuSG) + O,@ つ 2 Cu⑮ ky ィ N +| っのケ 1 oxidized 。S redueed Cu () 8。 elemental bromine can be cxtracted from seawater using chlorine ga 2 Brの Ss 09 っ mg + CMのー| 選の | oxidized Br reduced C% OrganismSigetitheir energy by COndHGHilFGGOXIEGHGHONSING “harvesting2 the energy released』軸heyineed (1) something to oxidize (an electron donor whichis theirfood) ②⑫) Somefhmgt6 oxidize it with (am electron acceptorleigl 0 ) 2. Here js an example ofa food molecule (glucose) being oxidized by oxygen in your body CHi。0。(くの店 6 0.(<のーー。 6CO:(@⑦ 直 6 H0⑰ 辺ダ +t ゝ汗(時 oxdized reduced 10. some bacteria use sulfate as their oxidizer (electron acceptor) instead ofO。 mm fhis example, the bacteria are partially oxidizing lactic acid to produce acetic acid NOTE: a fractional oxidation sfate is allowed for carbon @& this is not balanced as written Jacfic acid acetic acid CH。COOH(22) + HO⑦) + SOのつ CHiCOOH(42) + CO,(42⑦) + HS-(の oxidized reduced 11. Bacteria can also use nitrate as (heir electron acceptor. As nitrate gains electrons, it tuns into several other forms. Find the oxjdation state of nitrogen in each of them: which is most reduced and which is mosf oxidized. NO NO N, NHi 4 12. Bactera can use amn1Onium aS an energy SOurce when oxygen 1S Dresent tO Oxidize it、 2NHJ + 90。ご 2N と 4HO 2 ィ| RI oxidized reduced

Resolved Answers: 1

Chemistry Senior High over 5 yearsago