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(a) Which ion is smaller, Co3+ or Co4+?
(b) In a lithium ion battery that is discharging to power a device, for every Li+ that inserts into the lithium cobalt oxide electrode, a Co4+ ion must be reduced to a Co3+ ion in order to balance charge. Using the CRC Handbook of Chemistry and Physics or other standard reference, find the ionic radii of Li+, Co3+, and Co4+. Order these ions from smallest to largest.
(c) Will the lithium cobalt electrode expand or contract as lithium ions are inserted?
(d) Lithium is not nearly as abundant as sodium. If sodium ion batteries were developed that function as lithium ion ones, do you think "sodium cobalt oxide" would still work as the electrode material? Explain.
(e) If you don't think cobalt would work as the redox-active partner ion in the sodium version of the electrode, suggest an alternative metal ion and explain your reasoning.
Determine the delta G associated with the dissociation of 5.0g of C76H52O46 at room temperature in 50mL of pH=7.55 buffered solution that has already had 2.5g C76H52O46 dissolved into it.
Butane's (C4H10) molar enthalpy of vaporization is 22.44 kJ/mol and its normal boiling point is -0.40 °C. A 250-mL sealed Erlenmeyer flask contains 0.55 g of butane at -22 °C. a. What is the equilibrium vapor pressure under these conditions?
Based on the data for step 2 of the experiment, predict what would happen if you performed step 3 of the experiment (how many sets of three drops of each of the HCl and NaOH would be needed until the buffering capacity is lost for the two solution..
Problem- What is the oxidation number change for the bromine atom in the following unbalanced half reaction? BrO3-(aq) + H+(aq) -> Br-(aq) + H2O(l)
The titration of a weak base with a strong acid will have an end point a) with a pH greater than 7 b)with a pH less than 7 c) with a pH greater or less than 7 depending on the acid type d) there is not enough information to complete the statement
Calculate the density of a cube of unknown mental which weighs 38g and has a side of length 4cm.
what molecule would give the following mass spec data? m/z =15, 29, 43, 57 provide the dominate peaks in the spectrum. the m/z =57 (m-29) is the base peak. and the mz = 43 and 29 ions are also abundent.
distillation was performed. 3 fractions of a mixture of octane amp hexane were taken. as well as 3 fractions of a
1.succinctly introduce the following five environments of the company 9 ptsa.social environment external three
When iron metal is added to a solution of a silver salt, the iron goes into solution and the silver precipitates out according to the following:
Write the Complete Ionic Equation for the reaction between Magnesium Nitrate and Potassium Hydroxide
Potassium nitrate has lattice energy of -163.8 kcal/mol as well as a heat of hydration of -155.5 kcal/mol. Explain how much potassium nitrate has to dissolve in water to absorb 114kJ of heat
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