Question on Dillution?

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Question on Dillution?

If 500 grams of water is added to 75 grams of 25% NaCl solution, what is the percent by mass of NaCl in the diluted solution?

2007-06-09 03:09:57 · 3 answers · asked by Cookies 2 in Science & Mathematics ➔ Chemistry

3 answers

75*0.25 = mass of NaCl in the first solution

=18.75 g

after dilution what will be the total weight
75+500 = 575

now how can u calculate the mass percent?

18.75 g NaCl / 575 g Sol = 0.033 * 100% = 3.3%

2007-06-09 03:16:54 · answer #1 · answered by shaq 2 · 1⤊ 0⤋

75g on Nacl 25% contain 75*25/100 =18.75g on NaCL in a solution of 500+75 =575g

so the % is 18.75*100/575 =3.26% mass of NaCl

2007-06-09 10:31:43 · answer #2 · answered by maussy 7 · 0⤊ 0⤋

12.5 %

2007-06-09 12:19:33 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋