[john_19]

What mass of NaOH is needed to precipitate the Fe2+ ions from 48.0 mL of 0.200 M Fe(NO3)2 solution?

________g


In the laboratory, 6.67 g of Sr(NO3)2 is dissolved in enough water to form 0.550 L. A 0.100 L sample is withdrawn from this stock solution and titrated with a 0.0560 M solution of Na2CrO4. What volume of Na2CrO4 solution is needed to precipitate all the Sr2+(aq) as SrCrO4?
_____________L

Please help me thanks

[Mitch]

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