英语周报 2018-2022 高一 HZ 11答案

26.(1)为了提高浸出效率(1分)(2)<(2分)(3)H:O:O:H(2分)2Fe2++H2O2+2H+=2Fe3++2H2O(2分)(4)3.2≤pH<6.2(2分)(5)2Zn2'++HCO +3NH3.H,O=Zng (OH)2 CO3+3NH* +H2 O(2 23)(6)2Fe(OH)3+3C10+40H--2Fe0X-+3CI-+5H, O(2 3) Fe0:-+3e+4H, OFe(OH)3+5OH-(2分)(1)堆浸时将氧化铜锌矿粉碎的目的是为了提高浸出效率;(2)硫化铜不溶解,硫化锌溶解说明K(CuS)小于K(ZnS);(3)H2O2是共价化合物,电子式是H:O:O:H,加入H2O2氧化Fe2+,离子方程式是2Fe2++H2O2+2H+=2Fe3++2H2O;(4)由题中金属离子沉淀的pH,使Zn2+不沉淀,而Fe3+完全沉淀的PH是3.2≤pH<6.2;(5)加入碳酸氢铵和氨水发生反应生成Zn2(OH)2CO2的离子方程式是2Zn2++HCO3+3NH3,H2O=Zn2(OH)2CO3+3NH+H2O;(6)Fe(OH)3可用KClO溶液在碱性环境下将其氧化得到一种高效的多功能水处理剂一K2FeO4由氧化还原反应规律知,发生反应的离子方程式是2Fe(OH)3+3ClO-+4OH-一2FeO-+3Cl-+5H2O,高铁电池负极反应是Zn-2e-+20H=Zn(OH)2,正极反应式是FeO-+3e-+4H2O=Fe(OH)3+5OH-。]

读后续写 One possible version)A bad guy just p/cked Kim up and took her away! yelled Julie. So shocked were Kims parents thatthey jumped up from the sofa and rushed over to Julie. Learning what had happened, they phoned thepolice without delay. The nextnt, they jumped into their car and drove off directed by Julie. By thenT had reached the alley, but the man was nowhere to be seen. "I must find Kim, "TJ said to himself. Heran along the alley to the end, where he spotted the man walking towards a white house. "Stop! Stop Withhese words, he charged at the guy fearlessly and held fast to Kim. However hard the guy tried to get rid ofTJ. TJ wouldnt give inAt that very moment, Kim s parents arrived. Help! Help! "TJ shouted. Immediately Kim's father tookoff toward the guy. Seeing this. he guy hurriedly let go of Kim and broke into a run. Kim's father dashedup, caught hold of him and pressed him to the ground. Kim ran crying into her mother s arms. Minutes later,the police arrived and arrested the guy. TJ breathed a sigh of relief and smiled happily. T]'s quick thinkingand bravery saved a little girl in the neighborhood from unimaginable consequences

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