In a laboratory 6.80g of Sr(NO3)2 is dissolved in enough water to form 0.450L of solution. A 0.120L sample is withdrawn from this stock solution as well as titrated with a 0.0300M solution of Na2CrO4.
Explain what volume of Na2CrO4 solution is needed to precipitate all the Sr+2(aq) as SrCrO4?