can someone please helpme? 1.If 387 mL of sulfuric acid is diluted to 1.00 L to

Question

can someone please helpme?
1.If 387 mL of sulfuric acid is diluted to 1.00 L to give asolution that is 2.77 M, what was the concentration of theoriginal solution?

2.To prepare 124 mL of 0.100 M sodium chloride from astock solution of 1.00 M sodium chloride, how much stocksolution would you use?



can someone please helpme?
1.If 387 mL of sulfuric acid is diluted to 1.00 L to give asolution that is 2.77 M, what was the concentration of theoriginal solution?

2.To prepare 124 mL of 0.100 M sodium chloride from astock solution of 1.00 M sodium chloride, how much stocksolution would you use?

Explanation / Answer

1. Formula : MiVi = Mf Vf                       Mi*387mL= 2.77M*1000mL                       Mi = (2.77M*1000mL)/387mL                            = 7.16M    concentration of original solution = 7.16M 2. Stock solution needed = (124mL*0.100M)/1.0M                                       = 12.4mL    concentration of original solution = 7.16M 2. Stock solution needed = (124mL*0.100M)/1.0M                                       = 12.4mL

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