为检验糖尿病人的尿液，医院要配制8%的CuSO4溶液．现用16g无水CuSO4固体来配制溶液，可配制8%的CuSO4溶液______g，该溶液中铜元素的质量分数为______．配制时需要用到的六种主要仪器的名称是托盘天平（砝码、镊子）、______、
______、______、______、______．
现用16g无水CuSO4固体来配制溶液，可配制8%的CuSO4溶液的质量=16g÷8%=200g；
16g无水CuSO4固体含铜元素质量=16g×
×100%=6.4g64 160
该溶液中铜元素的质量分数=
×100%=3.2%6.4g 200g
利用无水硫酸铜固体配制硫酸铜溶液，需要经过计算-称量-溶解的过程，其中称量无水硫酸铜固体时需要托盘天平（砝码、镊子）与药匙，量取水量需要量筒与胶头滴管，溶解时则需要烧杯与玻璃棒；
故答案为：200；3.2%；量筒、烧杯、玻璃棒、胶头滴管、药匙．
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| Once upon a time there lived an old man in a nice cottage with a large garden. The old man was seen 1 his flowers all the time. They were so well-tended that every passer-by could not but 2 for a glance. One day a young man went by the garden. He gazed at the splendid garden, 3 in admiration at the beauty of these sceneries. Then, suddenly he 4 the old gardener was blind. 5 , the young man asked, "Why are you busy tending these flowers every day which you can't 6 in fact?" The old man smiled and answered that "I can tell you 7 reasons. First I was a 8 when I was young, and I really like this job. Second, although I can't see these flowers, yet I can 9 them. Third, I can smell sweetness of them. As to the last one, that's 10 ." "Me? But you don't know me," responded the young man 11 . "Yeah, it's 12 that I don't know you. But I know everyone knows flowers and would never 13 them down. I know the beauty of my garden will get many people into a good 14 . In the meantime, it also 15 a chance to me to have a word with you here and to enjoy the happiness these flowers have brought us." The old man's 16 astonished me. The blind man grows flowers and 17 them as a link of minds so as to make 18 enjoy the sunshine in spring. Isn't it one kind of happiness? I believe every flower has 19 with which they can see the kindness of the man's heart. The blind man grows flowers in his heart. Though 20 to see the beauty of blossoming, he surely can hear the voice of it, I suppose. | ||||
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