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Chemistry Senior High

鉛蓄電池 電気分解 1から5では白金や銅を使っているのに 6から急に鉛がでてくるのですが その理由について教えてもらいたいです お願いしますm(_ _)m

4図のような装置で, 一定の直流電流を流して電気分解を新 鉛蓄電池 うと,極板Dの質量が0.64g増加した。次の問いに答えよ。 (ただし,原子量はH=1.0, O=16, S=32, Cu=64, ファ A B C D ラデー定数F=96500 C/mol) Pt Pt Cu Cu (1)極板AとDで起こる反応をイオン反応式で示せ。 NaOH aq CUSO4 aq 電解槽II (2)(1)の2つの式の 子の A:40H - 2H,O + O2 + 4e 電解槽I D:Cu* + 2e" → Cu Cu の析出 と、 (2) 極板Aで発生する気体の物質量は何 mol か。 析出した Cu は 0.64 g=64g/mol3D0.010 mol A:40H → 2H。O + O。 + 4e 2 =0.0050 mol 4 5.0×10°mol よって, 極板Aで発生する気体O。 は 0.010 mol×- B:2Cu°* + 4e- → 2Cu =5.0×10°mol (3) 極板Aで発生する気体の質量は極板Bで発生する気体の質量の何倍か。 極板Bでは2H,O + 2e~→H2+ 20H~ なので, 物質量比は よって、 Cu:O2=2:1 ちなみに、 Cu:e=1:2 極板 A(O。):極板B(Hg) =D2:4=1:2 よって、質量比は 32×1:2.0×2=32:4.0=8.0:1.0 8.0倍 (4) 極板Cの変化量は何gか。 (4)質量だけでなく。 増加か減少かを必ず 明記すること。 極板C:Cu → Cu?* + 2e 直列なので極板Cと極板DのCu変化量は同量である。 0.64g減少 (5) 流れた電気量は何Cか。 流れた電子は 0.010 mol×2=0.020 mol よって求める電気量は 96500 C/mol×0.020 mol=1930 C 1.9×10°℃ (6)鉛蓄電池の負極の質量は何g増加したか。 鉛蓄電池の負極: Pb + SO,- PBSO。 + 2e よって電子0.020molが流れたとき, PBSO』 は 0.010 mol生成する。 純増加分は何gか? SO。=32+16×4 =96 g/mol ただし, Pb→ P6SO。 なので, 純増加分は SO。 の分。 96 g/mol×0.010mol=0.96g 0.96g

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English Senior High

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Lesson 19 , od ne mi m om a get their support. 5 He himself was through far-reaching reforms. He abolished slavery, introduced a *bureaucracv and 298628 ig piaum. ofh al nao o litmo of the 2010s, donated about 90% of his salary to charities which helped poor people. The he was often described as the world's *humblest head of state. Not all leaders are like them. Unfortunately, some leaders only care about their statis 15 When their popularity declines, they often try to shift the criticism onto others so as to maintain their power. The class system during the Edo period aimed at dividing people into classes and giving them contentment by encouraging them to look down on the lower classes. Hitler managed to win people's support by setting *Jews up as their enemies. It is quite difficult to satisfy everybody and unite a nation. Nevertheless, good leaders smo ons Tanolaom nd listen to people's voices, including critical ones, to make better policies for the welfare of 20 naw asng-1agie all the people from the perspective of national interests. So when you are qualified to vote, collect as much information as possible about candidates and political parties. It will help Coo b you judge whether they are willing to create a better society or are just trying to ake 25 advantage of their status for their own benefits. Your single vote can make a big differèIto to our future. oiauM 9oitasrf o eysW ) 363 words

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