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Compare the pH of an H2CO3 buffer (the first buffer) that contains 0.10 M H2CO3 and 0.10 M NaHCO3 with another H2CO3 buffer (the second buffer) that contains 0.15 M H2CO3 and 0.050. M NaCO3 Carbonic acid has a Ka of 4.3X 10^-7
Write chemical equations for the reaction of fluorine with the following substances, making sure that the numbers and kinds of atoms are the same on both sides of the equations. If no reaction occurs, write noreaction
Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture.( pKa1=1.30, pKa2=6.70.) Calculate the pH for each of the following points in the titration of 50.0 mL of a 2.7 M H3PO3(aq) with 2.7 M KOH..
When a solution of copper(II) sulfate is mixed with a solution of sodium carbonate, a precipitate forms. Write each of the following equations for the reaction between copper(II) sulfate and sodium carbonate.
calculate the pH of the solution that results when 40.0 mL of 0.100 M NH3 is mixed with 20.0 mL of 0.200 M NH4Cl solution.
Upon further analysis, the compound is found to be 25.305% C and 74.695% Cl. What is the molecular formula of the compound?
water can be expressed in polynomial form, vs the number of moles of ethanol (nEtOH), as 1002.93+54.6664*nEthOH-0.36394*nEthOH^2+0.028256*nEtOH^3, the partial molar volume of ethanol has its minimum value at m > 0.004 mol/kg.
An impure sample of potassium hydrogen phthalate, KHP, having a mass of 111.07 g was dissolved in water. This acid sample was neutralized by the addition of 310.0 mL of 0.250 M NaOH
Calculate the standard entropy change for the reaction 2H2(g)+ 02(g) --> 2H_2O(l) using the data from the following table: Substance Delta Hf degrees Delta Gf degrees S degrees
Backside attack on the bromonium ion by a bromide ion results in a trans products. The bromine is added to opposite sides of the carbon-carbon double bond.
A titration of sulfates in a 5.00 mL sample of drinking water with 10.0 mM (millimolar) of barium acetate as the titrant is carried out. A microflow pump was used instead of a buret
A culture of yeast gown under anaerobic conditions is exposed to oxygen, resulting in a dramatic decrease in glucose consumption by the cells.
discrete inquires at a company situated on the lake and employee confesses to you that they have been dumping 89 g/min for years but that the dumping has now stopped. If lake has a residence time of 100 days, the flowrate into the lake is 10 m3/s,..
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