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Define what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1,2,3, tricarobxylate) is mixed with 25.00 mL of 0.274 M HNO3 (to two d.p.)?
pKa1= 2.88, pKa2=4.75
Explain why heat change at constant pressure and constant volume have definite values.explain the terms exothermic endothermic and heat of reaction.
A trainee in a medical laboratory will be released to work on her own when her results agree with those of an experienced lab technician at the 95% confidence level. Following are the results from a blood urea level:
What is the most important extra step that has to be included in the first approach technique for assigning electrons in a heteronuclear diatomic molecule?
a metal sample weighing 45.0 grams and at a temperature of 99.1 degrees Celsius was placed in 38.6 grams of water in a calorimeter at 25.0 degrees Celsius. The calorimeter reached a maximum temperature of 32.8 degrees Celsius.
One method for favoring the formation of an ester is to add excess acetic acid. Suggest another method, involving the right-hand side of the equations, that will favor the formation of an ester.
A 0.456 gram sample of an unknown mono protic acid (let's call it HZ) was dissolved in some water (you pick the amount). Then the acidic solution was titrated to the equivalence point with 32.5 mL of 0.174 M KOH.
What volumes of sulfur dioxide and dihydrogen sulfide gases are necessary to produce 11.4 L of water vapor? The balanced equation is SO2 + 2 H2S à 3 S + 2 H2O.
At a certain temperature, the pH of a neutral solution is 7.45. What is the value of Kw at that temperature
What is the name and the geometric isomers structure of cis and trans of this coordination compound NH4[Pt(NH3)4Cl2]
Determine which ion will precipitate first and at what concentration of sulfate ion will the first precipitate begin to form?
What is the average molecular mass of a diving-gas mixture that contains 1.5\% by volume O2 and 98.5\% by volume He
How much 1.0 mol/L HCL would you need to add to 1 L of an imaginary buffer of 0.10 mol/L to change the pH from 6.8 to 6.0. Neglect volumes and remember that HCL disassociates completely
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