Question

What is a morality of a solution containing 6.8 g of Ba(NO3)2 in 250 mL of solution? show all intermediate calculations and answers, including molar mass calculation, unit conversion.

Q2. Draw the energy diagram of an endothermic reaction. Make sure to label the X- axis with REACTION COORDINATE and the Y axis with ENERGY . clearly label your diagram with REACTANTS, PRODUCTS, TRANSITIO STATE, ENERGY OF ACTIVATION

Answer 1

2 mo) 140 g mol Molar mass of Banos - Moot 2 MN tomo Molar mass of Ba, Mba. 137.339 Molar mass of N, MN = molar mass of o, Mo = 16.09 Molar mass of Ba NO3) = 137.33 + 2x14 + 6 x 16 261-339 mol mol mass moles Use expression molar mass 6-89 moles of Ba(NO3)2 261-339 mol 0.026021 moll Now, molarity of solution Is. given by molarity moles of solute volum of solution in liter Convert volume from m2 to Liter 250 m2 = 250m2 x IL 0.25 L 10oom2 0.026021 mol 0.25 L = 0.10408 mol molarity L 0.10408 m of solution is 0.10 m Molarity

Transition state Products Energy Ea (activation energy) ΔΗ Reactonts oc Reaction coordinate An energy diagram shows change in energy potershal of a system as reactan are converted to products positore for Enthalpy change (AH) is endothermic reaction. le energy of products are higher that reactants. The activaron energy (Ea) of a reachon is the barrier that must be overcome for reactant to be able to become products Activation energy in a energy diagram can be identified as the height between the peak of hill and energy of reactants The state corresponding to the highest potential energy is defined as transition state