soluion Ofa66 MnO, solution is mixed with 16.7 ml. ofo.892 M KMno, solution. Cal

Question

soluion Ofa66 MnO, solution is mixed with 16.7 ml. ofo.892 M KMno, solution. Calculate the concentration of the final solution. M K 11) Calculate the volume of in ml. of a 1.420 M NaOH solution required to tirate the following solutions: a) b) c) 25.00 mL of a 2.430 M HCI solution 15.00 mL of a 4.500 M HNO, solution 10.00 mL of a 1.300 M HBr solution Pirst write out the balanced chemical reaction between the two substances 12) A quantity of 18.68 mL of a NaOH solution is needed to neutralize 0.4218 g of KHO4. What is the molar concentration of the NaOH solution? The neutralization reaction is given by: KHGH404(aq) + NaOHa) KNaCkLOuaq) + H2Ou sider the net ionic equation: CT2072-+ 6Fe2+ + 14H+ 2Cr" + 6Fe3+ + 7H20. If it takes 26.0 mL of 0.0250 M Cr20, )to titrate 25.0 mL of a solution containing Fe, what is the molar concentration of Fe2? 14) Consider the reaction: 2Mnor + 5H2O2 + 61r 502 + 2Mn2+ + 8H20. If 36.44 mL of a 0.01652 M MnOs()solution are required to oxidize 25.00 mL of an H202 solution, calculate the molarity of the H202 solution. 15) A 325 mL solution sample contains 25.3 g of CaCl2. (a) Calculate the molar concentration of CI in this solution. (b) How many grams of Cl' are in 0.100 L of this solution?

Explanation / Answer

Ans 1o;

Number of moles of solution 1 will be : 1.66 x 0.0352 = 0.058432 moles

Number of moles of solution 2 will be : 0.892 x 0.0167 = 0.0148964 moles
The total number of moles will be : 0.058432 + 0.0148964 = 0.0733284 moles

The total volume will be : 35.2 + 16.7 = 51.9 mL or 0.0519 L

Molarity = no. of moles of KMnO4 / volume of solution in L

M = 0.0733284 / 0.0519

M = 1.41 M

So the concentration of final solution will be 1.41 M

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