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Question- A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.26 solution.
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This diluted sample is placed in a variable pathlength cell. The absorbance of the reference and the sample solutions match when the pathlength is 2.55 cm. 1) What is the concentration of iron in the well water. For each solution the zero is set wi..
Mercury and Bromine will react with each other according to the reaction: Hg (l) + Br2 (l) ? HgBr2 (s) What mass of mercury (II) bromide can be produced from the reaction of 10.0 g Hg and 9.00 g Br2? How much of the excess reagent remains at the e..
Calculate the heat evolved in kilojoules by the formation of the solution. Calculate the heat evoled per mole of sulfuric acid. Use n(changeH) = -(mCchangeT)
If the standard heat of rxn for the rxn is calculated to be -567.4 kJ/g mol FeS2(s) what is the value of Delta Hrxn will you use per kg of FeS2 burned in an energy balance
The boiling point of an aqueous solution is 101.31 °C. What is the freezing point. Constants can be found here.
When a strong base is added to a solution of CuSO4, which is pale blue, a precipitate forms and the solution above the precipitate is colorless. What is the net chemical equation that describes this reaction? Include the phases of all species in t..
Define internal energy and enthalpy. What is the difference between the two? List the following gases in order of increasing root-mean-square speed, all at the same temperature: H2, He, O2, Ne
The density of titanium metal is 4.51 g/cm^3 at 25 degrees C. What mass of titanium displaces 64.0 mL of water at 25 degrees C?
The following properties were measured for an unknown hydrocarbon in a lab with an ambient temperature of 28 degrees Celsius and a barometric pressure of 28.9 inches of mercury (1 inch Hg=25.4 torr)
trans-2-Butene is more stable than cis-2-butene by only 4 kJ/mol, but trans-2,2,5,5-tetramethyl-3-hexene is more stable than its cis isomer by 39 kJ/mol. Explain.
what is the ph after 45.0ml of .1M HCl is added during the titration of 30.0ml of 0.1 Mweak base that has a (kb=5.2 *10^-4)
A 0.366-g sample of an unknown reducing agent required 30.0 mL of 0.100 N (normality) KMnO4 for titration. What is the equivalent weight of the reducing agent?
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