问题
问答题
向氢氧化钠溶液中滴加硫酸铜溶液能够观察到______，发生的化学反应方程为______．
答案
氢氧化钠溶液和硫酸铜溶液反应生成了蓝色的氢氧化铜沉淀和硫酸钠，该反应的化学方程式为：2NaOH+CuSO4=Cu（OH）2↓+Na2SO4．
故答案为：产生蓝色沉淀；2NaOH+CuSO4=Cu（OH）2↓+Na2SO4．
搜题请搜索小程序“爱下问搜题”
向氢氧化钠溶液中滴加硫酸铜溶液能够观察到______，发生的化学反应方程为______．
氢氧化钠溶液和硫酸铜溶液反应生成了蓝色的氢氧化铜沉淀和硫酸钠，该反应的化学方程式为：2NaOH+CuSO4=Cu（OH）2↓+Na2SO4．
故答案为：产生蓝色沉淀；2NaOH+CuSO4=Cu（OH）2↓+Na2SO4．
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| It was Sunday yesterday. Henry wasn't 1 home. He was on a 2 to the zoo. An old man got on the bus. Henry stood up and 3 to him, "Come and sit here, please." He helped the old man 4 ." Thanks 5 , good boy," the old man said."You're welcome," said Henry. The bus went on. Thirty minutes later, it stopped 6 the zoo. Henry got off the bus and said 7 to the old man. The old man smiled (微笑) at him in a friendly way. Henry went into the zoo. 8 of the people there are students. He 9 a lot of animals and birds, and he also took many photos. He spent a happy weekend 10 he helped others and had a good time in the zoo. | |||
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