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The lead-acid battery is commonly used in cars. One electrode is a lead grid filled with spongy lead Pb(s). The other electrode is a lead grid filled with spongy lead oxide PbO2(s). The net reaction that occurs is:
Pb(s) + PbO2(s) + 2H+ (aq) + 2HSO4 - (aq) →2PbSO4(s) + 2H2O(l)
a) Write down the balanced half reactions that occurs at each electrode.
b) Identify the oxidation state of Pb in each of the species: Pb(s), PbO2(s) and PbSO4(s).
c) Identify the anode and the cathode.
Determine the reaction equation and molal air/fuel ratio for the combustion of dimethyl ketone (acetone), CO(CH3)2, with 0.00% excess air.
Water is ubiquitous and necessary for life on our planet. Describe the numerous unique properties of water and how it supports life. With specific applications to humans, what are the most common chemical contaminants of municipal water supplie..
Show the mechanims of a the dehydration between the amino group on the lysine and the carboxylic acid on the valine that creates the peptide bond.
Find out which conjugate acid is more stable. c) Offer a structure based rationale for the observed difference in basicity. d) Circle the more basic nitrogen in the structure below. The structure is 4-Dimethylaminopyridine.
1. Define normality. Give the normality for the following solutions:
Compute the rate constant for the oxidation of Fe2+ below in a water sample that is open to the atmosphere given that half of the Fe2+ is consumed after 23 seconds at 25 degrees C. Presume first order kinetics with respect to Fe2+ Fe2+(aq) + O2(aq..
A sample of pure oxygen gas has a pressure of 795 torr. What is the pressure of the oxygen in units of atmospheres. A) 0.795 atm B) 1.05 atm C) 0.604 atm D) 0.760 atm E) 1.01 atm
The flask was filled to the calibration mark with water, and the contents were thoroughly mixed. What were the equilibrium concentrations of H+, Na+, H2PO-4 , and HPO-2 in the resultant solution? Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13..
corn farmers typically use 5000 kg of ammonium nitrate per square kilometer of cornfield per year. Ammonium nitrate can be prepared by the following reaction. how much nitric acid would be needed to make the fertilizer needed for 1km2 of cornfield..
A buffer is composed of 0.400 mol H2PO4^- and 0.400 mol HPO4^2- diluted with water to a volume of 1.00 L. The pH of the buffer is 7.210. How many moles of HCl must be added to decrease the pH to 6.210?
A 0.0355 g sample of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Upon cooling, the camphor freezes at 157.7°C. Calculate the molar mass of the unknown compound.
A reaction has an activation energy of 40 kJ/mol. What happens to the rate if you increase the temperature from 70 C to 80 C? Does the rate increase by
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