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mole question chemistry.com/myct/itemView?assignmentProblemiD-500822038offset-next HM 1115, Term 1, 2015 ± Core Chemistry skill. Calculating Molanty or volume of an Acid or Base in lating Molarty or Volume of an A chemist needs to determine the concentration of a solution of nitric acid, HNO, She puts 905 mL ofthe acid in a fask alon then slowty adds 0800 MBa(OH)h to the fask until the solution turns pink, indicating the equivalence point of the titration Sh was needed to reach the equivalence point a solution using ase Solution map in this ttration, the concentration of base is known and can be used to calculate the unknon acid concentration: or base) of known concentration nown concentration until the concentration of base moles of base-moles of acid- concentration of are equal, a condition called now the number of moles of can determine the number of nown solution Part A How many motes of Ba(OH) are present in 245 mL oro 800 MBa(OH? Express your answer with the appropriate units. 1 mol of HoS04 contains s, and would therefore require Value Units Subrnit nts My Answers Give Up Review Part Part B This question will be shown after you complete previous question(s)

Explanation / Answer

Given the volume of Ba(OH)2 is , V = 245 mL = 245 x 10 -3 L = 0.245 L                   Since 1 mL = 10 -3 L

Molarity of Ba(OH)2 is , M = 0.800 M

We know that Molarity , M = number of moles / volume of solution in L

So number of moles of Ba(OH)2 is , n = Molarity x volume in L

                                                             = 0.800 M x 0.245 L

                                                             = 0.196 mol

Therefore the number of moles of Ba(OH)2 is 0.196 mol

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