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Consider the titration of 30.0 mL of 0.035 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added.
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A smple of mixture of NaCl, Caco3 and SiO2 weighed 7.30 grams. During the water wash the sample lost 2.21 grams. After treatment with HCL, the sample weighed 2.05 grams.
What is the identity of the metal if 0.280 grams of the metal is plated out in the electrolysis? Show all calculations.
What are the seven redox reactions of these species of Mn2+?Mn2+ Mn(OH)2 (s) Mn3O4 (s) Mn2O3 (s) MnO2 (s) H2O H+ e-
There are two reason why the enols of beta-dicarbonyl compounds, such as pentane-2,4-dione are relatively stable. One is that they are conjugated and the pi-electron overlap due to the conjugation provides additional stability.
Calculate the change of entropy for the water, ΔS water, and for the surroundings, delta S surroundings, when 1.00 mole of water freezes at 0 degrees C and the surroundings are at (a) 0 degrees C, (b) -2 degrees C. Explain the physical origin of t..
The resulting W3 was transferred to 500.0 mL of 1.00 M HCl. A 100.00 mL aliquot of the HCl solution required 10.13 mL of 0.08840 M potassium permanganate (KMnO4) to reach the purple endpoint. A blank required 0.18 mL. Determine the percent WO3 in ..
A solution is prepared by adding 1.10 g of solid rm NaCl to 50.0 mL of 0.100 M {CaCl_2}. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
Determine ΔG for this reaction When A is full into a cylinder at a pressure of 9.89 atm and the system is permitted to come to equilibrium, the final pressure was 15.94 atm.? Express your answer in units of kJ/mol
A 100g iron ball (specific heat= 0.473 J/g degrees celcius) is heated to 125 degrees celcius and placed in a calorimeter holding 200g of water at 25.0 degrees celcius. What will be the highest temperature reached by the water?
Provide a molecular-level explanation for why the absorbance of light increases as the concentration of dissolved food dye in a solution increases.
80 micrograms of lead were detected in 5 L of drinking water. What is the concentration of lead in molarity (M)
Construct the MO diagram for planar BH3 and for pyramidal BH3. Based on your MO diagram , why is BH3 planar?
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