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The "fluoride" is often present in the range of 1.4 ppm. But, in reality, this total fluoride is a mixture of F- and HF because HF is a weak acid.
Determine the standard cell potential for the Sn2+ (aq)+ Ni (s) → Sn (s) + Ni 2+ (aq). In a certain cell, the concentration of Sn 2+ is 0.0010 M and the concentra
The equilibrium partial pressures of N2O4 and NO2 are 0.20atm and 0.15 atm, respectively at the 25°C. Determine the partial pressure of the gases when a new equilibrium is established
The activation energy of the exothermic reaction is greater than that of endothermic reaction. Outline the potential energy profile diagrams for these 2 reactions on the same graph.
Determine how many grams of CuS are obtained by passing a current of 12A through a solution of CuSO4 for 15minutes?
Determine the wrong with this setup? If the tech prepared a solution containing equimolar concentrations of H2CO3 and HCO3- , what would be the pH of the resulting buffer?
Compute the mole fraction of NaCl in this mixture after all the ice melts. Compute the freezing point of this mixture (in the Celsius) if the homemade ice-cream is frozen by churning it in a bucket
Discuss what minimum phosphate concentration would it take to precipitate a calcium phosphate kidney stone where the Ksp calcium phosphate = 1.0 x 10-25
When 25 mL of a solution which is having both Fe3+ and Fe2+ ions is titrated with the 23 mL of 0.02 M KMnO4 all of the Fe2 ions are oxidized to the Fe3+ ions.
Suppose you titrate a 38.8 ml sample of vinegar with 29.53 ml of a standardized 0.2686 N solution of NaOH. Vinegar is an aqueous solution of acetic acid, CH3COOH.
Determine the amount of heat that must be supplied to an aluminum pan which is having 750.0 ml of water to raise its temperature from the 22.3Celsius to the boiling point of water. The mass of the p
Determine how many grams of cadmium are deposited from an aqueous solution of cadmium sulphate CdSO4, when an electric current of 1.51 amps flows through the solution for 156minutes?
An aqueous solution contains these ions and concentrations: Br- [0.0010], Cl [0.0010], and CrO42-[0.0010]. A solution of silver nitrate is added drop wise to the aqueous solution. Explain which
A water desalination plant is set up near a salt marsh containing water that is 0.26 M NaCl. Determine the minimum pressure that must be applied at the 20. ºC to purify the water by
Determine the molar mass and find out the unknown gas using the following information: an unknown gas has a rate of effusion of 4.1 times that of H2. The unknown gas is a naturally occurring d
A system which is having of 57.5 g of liquid water at the 298K is heated using an immersion heater at a constant pressure of 1.00bar.
An automobile tire contains air at the 320 x 10^3Pa at 218.15 K. The stem valve is removed and the air is allowed to expand adiabatically against the constant external pressure of 100x 10^3 Pa until
Write down the formula for the complex ion produced by the metal ion Cr+3 and six NO2 IONS AS LIGANDS and decide whether the complex could be isolated as a chloride salt or a potassium salt, and wri
Consider A be set defined by A = {p/q | p,q are odd naturals and q is nonzero}. Determine a set B which satisfied given four conditions.
Determine the range of energies of photons within this region. The visible region of the electromagnetic radiation spectrum is generally accepted to be composed of radiation of wavelengths from 400
A chemical plant uses electrical energy to decompose aqueous solutions of NaCl to give the Cl2, H2 and NaOH: 2NaCl (aq) + 2H2O(l) --> 2NaOH(aq) + H2(g) + Cl2(g).
Determine cardinality of given set. B = {9, 18, 27, 36, 45, 54, 63, 72}. Determine cardinality of the given set. Determine complement of set given that
What are the concentrations of H3O+ and CH3COO- at equilibrium by using the amount ionized in the first question.
Make use of the definitions of the coefficient of thermal expansion, α , and the isothermal compressibility, Κt, and start from the expression for the total differential dV in terms of
If 0.050 moles of NaC2H3O2 is added to the solution to produce an acid buffer (i.e. WA + Salt), calculate the resulting pH, (H+), pOH and (OH+) for the buffer solution.