Question

Ten pints of 15 % salt solution are mixed with 15 pints of 10 % salt solution. What is the

concentration of the resulting solution?

Answer 1

`Concentration\ rate=(mass\ of\ product)/(mass\ of\ substance)*100\%\\\\ 15\%=(m_1)/(ms_1)*100\%\\ms_1=10pints\\ 15\%=(m_1)/(10)*100\%\\ (15)/(100)=(m_1)/(10)\ \ |*10\\ m_1=(150)/(100)=1,5pints\\\\ 10\%=(m_2)/(15)*100\%\\ 0,1=(m_2)/(15)\ \ |*15\\ 1,5=m_2\\ Resulting\ solution:\\ ms=ms_1+ms_2=15+10=25pints\\m=m_1+m_2=1,5+1,5=3pints \\(m)/(ms)*100\%=(3)/(25)*100\%=12\%`