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Explain what is the pH of a buffer made by mixing 0.125 mole of Formic acid Ka=1.78x10-4 with 0.190 moles of Sodium formate in a final volume of 1.75 liters? Demonstrate calculations please.
Calculate the expected change in temperature for 1.7 g of NH4NO3 dissolved in 50.0 mL of H2O. Assume that the calorimeter absorbs no heat.
Presume that a pollutant enters the environment at a steady rate R as well as that, once there, its concentration decays by a first-order reaction. At long times the concentration of the pollutant turn into constant at some nonzero value.
If the salt bridge consists of a gel containing approximately 1 M KNO3, will the NO3-ions flow into the right hand (Cu, Cu2+) or left hand (Al, Al3+) half-cell when the circuit is completed
The calorimeter and water absorb 21.9 kJ of heat. How much heat is given off when one mole of salicylic acid burns
Calculate the enthalpy change per mole of boron consumed in the reaction:4B(s) + 3O2(g)---->2B2O3(s)If more than one value is given, use the CODATA Review value.
Deal gases can be defined in terms of microscopic assumptions, assumptions about the values of macroscopic measurements or an equation of state
Write the structural formulas for the products that form when 1-butene reacts with each of the following reagents: a) HI b) H2, Pt c) Dilute H2SO4, warm d) Cold concentrated H2SO4 e) Cold concentrated H2SO4, then H2O and heat
A sample contains Ba3(PO4)2, CdS, AgCl, NH4Cl, and ZnS. Identify the soluble ions after the addition of 6 M HCl; H2S and 0.2 M HCl; OH- to a pH of 8; and (NH4)2HPO4 with NH3. A) Ba3(PO4)2 B) NH4Cl C) CdS D) ZnS E) AgCl
For benzene(C6H6), AE=30 and NE=38. Explain how the eight-electron deficiency is eliminated by the structure of the molecule.
Write a balanced chemical equation for the neutralization reaction upon which this titration is based, and indicate clearly which atom is being protonated.
what are the chemical properties of corundumaluminium
If the outer electron in a Sn- ion is removed by absorbing a photon of visible light having an energy of 3.618E-19 J, what is the amount of leftover energy that goes into the kinetic energy of the ejected electron
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