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(a) A 0.5872-gram sample of potassium hydrogen phthalate (KHC8H4O4) is dissolved in 50.0 mL of solution. What is the molarity of this solution?
(b) The entire solution of "KHP" (abbreviation for "potassium hydrogen phthalate") is titrated with sodium hyroxide solution which concentration is unknown, using phenolphthalein as the indicator 22.90 mL of NaOH solution is used to reach end-point, determine the molar concentration of NaOH.
(c) The same NaOH solution is then used to titrate a 10.00-mL sample of sulfuric acid (H2SO4) of unknown concentration, which requires 25.80 mL of the base to neutraize the sulfuric acid. What is the molarity of H2SO4? The acid base reactions that occur during the two titrations are as follows: (i) KHC8H4O4(aq) + NaOH(aq)--->NaKC8H4O4(aq) + H2O(l); (ii) H2SO4(aq) + 2NaOH(aq)--->Na2SO4(aq) + 2H2O(l)
125 mole of oxygen gas is added to carbon in a .25L container. The mixture equilibriates at 500K. Calculate the equilibrium concentration of carbon monoxide, knowing that K=.086 at 500K.
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum
As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chip products for the packaging label. The potato chips are seasoned with table salt, NaCl.
How many atoms are contained in one unit cell of of this element? The atomic mass of the element is 193.5 amu.
Use the ideal gas and the van der Waals equations to calculate the pressure when 3.00 mol of H2 are confined to a volume of 1.00 L at 298 K
.35 M NaOH solution to reach the equivalence point. Determine the molar mass of the acid and given nthat the pH at the half way point to the equivalent point is 3.86. Calculate the Ka of the unknow acid.
Use VSEPR theory to predict the shape of each molecule: a) CF3; b) NCl3; c) SCl2; d) CS2; e) BFCl2.
If the electrochemical cell is allowed to operate as a gavanic cell, which solution species will be oxidized, which solution species will reduce. write the sybolic representation for the galvanic cell.
A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
It takes 10 microliters of solution to produce a spot 1 cm in diameter. If the co(no3)2 solution contains about 6g co2+ per liter, how many micrograms of co2+ ion are there in one spot
The standard free-energy difference between the two chair conformations of isopropylcyclohexane is 9.2 kJ mol-1 (2.2 kcal mol-1). What is the ratio of concentrations of the two conformations (axial and equatorial) at 25 °C
Draw structural formulas for all of the structural isomers of C4H10, C5H12 and C3H7Cl.
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