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This problem describes a gravimetric titration in which the mass of titrant is measured instead of the volume. A solution of NaOH was standardized by titration of a known quantity of the primary standard potassium hydrogen phthalate (KHP) which has a formula of KC8H5O4:
The NaOH was then used to find the concentration of an unknown solution of H2SO4.Titration of 0.51g of KHP required 36.07g of NaOH solution to reach the endpoint detected by phenolphthalein indicator. Determine the concentration of NaOH expressed as mol NaOH/kg solution. A 11mL sample of H2SO4 was found to require 53.3g of the NaOH solution to reach the phenolphthalein end point. Find the molarity of the H2SO4.
Assume for simplicity that the volume of the mixture is exactly equal to the sum of the volumes of the ingredients (which is not true, by the way). What is the mass concentration of oxygen in the mixture?
A 40.0 mg sample of a protein is dissolved in water to make 25.0 mL of solution. The osmotic pressure of the solution is 0.56 torr at 25°C. What is the molar mass of the protein?
Draw the ideal distillation curve for a 50:50 mixture of two miscible liquids. How do you achieve ideal distillation
The next day you notice that some of the gas has leaked out. The pressure and temperature remain the same, but the volume has changed to 10.0 L. How many moles of gas (n2) remain in the cylinder
Calculate what the limiting reactant is in the reaction between copper (II) oxide and hydrochloric acid
Hydrogen sulfide is a common and troublesome pollutant in industrial wastewaters. One way to remove H2S is to treat the water with chlorine, in which case the following reaction occurs
Calculate the volume of the NaOH solution prepared in (2) required to react with all of the t-butyl chloride in 1.0mL of the 0.050M solution prepared in (1)?
5 mL 1 M HCl and 10 mL .005 M iodine. If the reaction order is zero with respect to iodine, how long will it take for the iodine color to disappear?
The concentrations of lead in blood samples are often reported in units of micromoles of lead per liter of blood. Calculate the value of the concentration in these units of a blood sample containing 45 ppb lead.
the solution has an osmotic pressure of 4.18mm Hg at 25C,what is the molar mass of new protein?
Method for Trapping a Gas, The decomposition of 3-sulfolene to form 1,3-butadiene generates 1 mole of sulfur dioxide gas per mole of 1,3-butadiene. Substantial quantities of SO2 would be generated if this decomposition were carried out on a large ..
Polychlorinated biphenyls (PCBs), which were formerly used in the manufacture of electrical transformers, are environmental and health hazards. They break down very slowly in the environment. The decomposition of PCBs can be represented by the equ..
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