Aisha khanAligarh Muslim University - AMU
In the absence of oxygen, glucose, C6H12O6(aq), can undergo fermentation producing ethanol, C2H5OH(l), and carbon dioxide, CO2(g), as represented by the following equation.
C6H12O6(aq) → 2C2H5OH(l) + 2CO2(g)
Assume the value of ∆f H° for C6H12O6(aq) is the same as the value of ∆f H° for C6H12O6(s).
The enthalpy change associated with the fermentation reaction is?
. A 1.248 g limestone rock, which contains CaCO3 and other compounds, is pulverized and treated with 30.00 mL of 1.035 M HCl solution. The excess acid requires 11.56 mL of 1.010 M NaOH for neutralization. Calculate the percent by mass of calcium carbonate in the rock, assuming it is the only substance reacting with the HCl solution.
The Concentration of HCl, a strong acid, is 0.5 mol/L. If 20 mL HCl is needed to titrate 40 mL of NaOH, what is the Concentration of NaOH?
2. What would be the molar concentration of a HCL solution if 25.0 mL of the solution is neutralized by 15.5 mL of 0.800 mol/L NaOH?
3. a) Explain what an equivalence point is in a titration.
b) What is the purpose of an indicator in the solution with the unknown concentration?
4. A strong acid and a weak acid that are both 1.0 mol/L react differently with zinc. Choose two acids and with the aid of equations and dissociation, explain why this is the case.