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The half-cell, Tl | Tl+(1 mol L-1), is connected to a Pt | H+ | H2(1 atm) half-cell in which the concentration of H+ is unknown. The measured cell voltage is 0.0841 V and the Pt | H2 | H+ half-cell is the cathode. Standard reduction potentials are given on the next page. (a) Draw a diagram of the electrochemical cell, labeling all electrodes and solutions. (b) What is the pH in the Pt | H+ | H2 half-cell? (c) What is the value of the equilibrium constant for the reaction occurring in this cell?
what effect could having too much compound in the capillary tube have on the observed melting point? a) the observed melting point would not change
A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 20.01°C to 29.99°C. What is the heat of combustion per gram of octane?
What is the percent H2SO4 for a solution consisting of 4.62 equivalencies of H2SO4 mixed with 11.2 kg of water if both portions
A 100.0 mL of 10.0 mM phosphate buffer, pH 7.5 (pka2 = 7.2). You are provided with 0.200 M KOH and 0.100 M KH2PO4 solutions, Calculate volume of KOH and KH2PO4 solutions
HbS has normal shape under normal conditions, but under conditions of low [O2] the hemoglobin forms fibrous aggregations, giving the entire red blood cell a sickle shape. (See image of eight HbS molecules at right.)
The density of silver is 10.5 g/mL. What is the mass (in grams) of a piece of silver with a volume of 23.6 mL
A reaction is initiated at 30°C by dissolving 0.2M fructose-1-phosphate in an aqueous solution. When the reaction reaches equilibrium the concentration of fructose-1-phosphate is 6.52 x 10-5M.
Which one of the following pairs of gases contains the same number of molecules (a) 16 g of O2 and 14 g of N2 (b) 8 g of O2 and 22 g of CO2 (c) 28 g of N2 and 22 g of CO2 (d) 32 g of O2 and 32 g of N2
How much limestone in kg is need to completely neutralize a lake containing -- of H2 per liter? 5.0 * 10-3g SO4 5.2 * 10^9-L.
water in a coffee-cup calorimeter (see above figure) the temperature rises from 24.00 oC to 40.03 oC. Calculate H in kJ/mol FeCl3 for the solution process.FeCl3(s) Fe3+(aq) + 3 Cl-(aq)
The d-d transition in [Ti(H2O)6]3+(aq) produces an absoption maximum at 500 nm. What is the magnitude of DELTA for this complex in kJ/mol?
how efficient is the extraction of tea leaves containing 1.0g of caffeine with two 30mL portions of chloroform over that of a single-step extraction? KD= 8.36 at 25 C)
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