英文化学题,感觉题的几个选项都不对吧?What volume of sodium hydroxide solution of concentration0.10 mol dm-3 would be needed to neutralize 25 cm3 of a solution of sulphuric acid of concentration 0.25 mol dm-3?A.25 cm3B.50 cm3C.62.5 cm3
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![英文化学题,感觉题的几个选项都不对吧?What volume of sodium hydroxide solution of concentration0.10 mol dm-3 would be needed to neutralize 25 cm3 of a solution of sulphuric acid of concentration 0.25 mol dm-3?A.25 cm3B.50 cm3C.62.5 cm3](/uploads/image/z/13102681-49-1.jpg?t=%E8%8B%B1%E6%96%87%E5%8C%96%E5%AD%A6%E9%A2%98%2C%E6%84%9F%E8%A7%89%E9%A2%98%E7%9A%84%E5%87%A0%E4%B8%AA%E9%80%89%E9%A1%B9%E9%83%BD%E4%B8%8D%E5%AF%B9%E5%90%A7%3FWhat+volume+of+sodium+hydroxide+solution+of+concentration0.10+mol+dm-3+would+be+needed+to+neutralize+25+cm3+of+a+solution+of+sulphuric+acid+of+concentration+0.25+mol+dm-3%3FA.25+cm3B.50+cm3C.62.5+cm3)
英文化学题,感觉题的几个选项都不对吧?What volume of sodium hydroxide solution of concentration0.10 mol dm-3 would be needed to neutralize 25 cm3 of a solution of sulphuric acid of concentration 0.25 mol dm-3?A.25 cm3B.50 cm3C.62.5 cm3
英文化学题,感觉题的几个选项都不对吧?
What volume of sodium hydroxide solution of concentration
0.10 mol dm-3 would be needed to neutralize 25 cm3 of a solution of sulphuric acid of concentration 0.25 mol dm-3?
A.
25 cm3
B.
50 cm3
C.
62.5 cm3
D.
67.5 cm3
E.
130 cm3
英文化学题,感觉题的几个选项都不对吧?What volume of sodium hydroxide solution of concentration0.10 mol dm-3 would be needed to neutralize 25 cm3 of a solution of sulphuric acid of concentration 0.25 mol dm-3?A.25 cm3B.50 cm3C.62.5 cm3
同感,没有正确答案!
先确认一下有没有翻译错:
多少摩尔的0.10mol/dm³的氢氧化钠溶液可以中和25cm³的0.25mol/dm³硫酸溶液?
n(H2SO4)=0.25*0.025=0.00625mol
2mol的NaOH可以中和1mol的H2SO4
所以:n(NaOH)=2n(H2SO4)=0.00625mol*2=0.0125mol
V(NaOH)=(0.0125mol)/(0.0001mol/cm³)=125cm³
没有正确答案
V=25*0.25*2/0.1=125cm3
答案应该是125cm3。求需要多少体积的0.1mol/l的NaOH才能中和0.25mol/l的硫酸25cm3
0.1×V=2×25×0.25,解之得,v=125