the salty water becomes 3% concentrated after adding some water at the first time.then afterthe salty water becomes 3% concentrated after adding some water at the first adding the same grams of water,it becoms 2% concentrated..what's the concentracti
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![the salty water becomes 3% concentrated after adding some water at the first time.then afterthe salty water becomes 3% concentrated after adding some water at the first adding the same grams of water,it becoms 2% concentrated..what's the concentracti](/uploads/image/z/12793170-66-0.jpg?t=the+salty+water+becomes+3%25+concentrated+after+adding+some+water+at+the+first+time.then+afterthe+salty+water+becomes+3%25+concentrated+after+adding+some+water+at+the+first+adding+the+same+grams+of+water%2Cit+becoms+2%25+concentrated..what%27s+the+concentracti)
the salty water becomes 3% concentrated after adding some water at the first time.then afterthe salty water becomes 3% concentrated after adding some water at the first adding the same grams of water,it becoms 2% concentrated..what's the concentracti
the salty water becomes 3% concentrated after adding some water at the first time.then after
the salty water becomes 3% concentrated after adding some water at the first adding the same grams of water,it becoms 2% concentrated..what's the concentraction of the salty water after adding the same grams of water at the third time?
the salty water becomes 3% concentrated after adding some water at the first time.then afterthe salty water becomes 3% concentrated after adding some water at the first adding the same grams of water,it becoms 2% concentrated..what's the concentracti
设有溶液a克,溶液中的溶质有x克,每次加水y克.
则根据条件可以列出方程:
x/(a+y)=3%,x/(a+2y)=2%
解得y=a,x=0.06a.
所以第三次加水时,浓度为x/(a+3y)=0.06a/(a+3a)=1.5%
So the concentraction of the salty water after adding the same grams of water at the third time is 1.5%.