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Determine the equivalent acid-base equilibrium that results when each of the following pairs of solutions is mixed. 25.0 mL of 0.50 M NaOH + 12.0 mL of 1.50 M HCl Pick two initial conditions from first four choices. Pick one choice from remaining choices to indicate type of equivalent solution. Choose at least one answer. a. Weak acid b. Strong acid c. Weak base d. Strong base e. pH determined by excess concentration of diluted strong acid (some acid used to neutralize base) f. pH determined by excess concentration of diluted strong base g. pH determined by concentration of diluted strong acid h. pH determined by buffer equation (resulting mixture produces a buffer) i. pH determined by conjugate base concentration (equivalent to equivalence point in titration of weak acid) j. pH determined by excess concentration of diluted strong base (remaining strong base + weak conjugate base = beyond equivalence point in titration of weak acid)
When 35.0 g of an unknown nonelectrolyte is dissolved in 220.0 g of benzene, the solution boils at 83.2°C. Calculate the molecular weight of the unknown nonelectrolyte. The Kb for benzene = 2.53°C/m. The boiling point of pure benzene is 80.1°C.
I have a 3-methyl-1-Pentyne compound starting in an only (s) configuration and I'm putting in H2 and Pt. The product of this reaction would be.... a) Only (S) b) Only (R) c) (R) + (S) d) Achiral
Balance the equation below using the smallest whole numbers for coefficients assuming the redox reaction occurs in acid solution. Add water where appropriate
The volume of a helium balloon is 75.4m^3 (or 7.54x10^L) at 20 degrees Celsius and 1.00 atm. (a) What is the mass of the helium gas in the balloon
find the mass of C3H8 required to generate 2.5x10^8 KJ of energy when combusted with O2 gas to produce CO2 gas and water vapor.
what kind of inter-molecular interactions would likely dominate? explain your reasoning
Brass has a specific heat capacity of 0.393 Joules/g C. A paperweight weighing 129g is heated to 95.0 C. Then it is added to 44.6g of water in a calorimeter having a temperature
A gas sample containing 1.64 mol at 25°C exerts a pressure of 389 torr. Some gas is added to the same container, and the temperature is increased to 50.°C.
Working with triple point, The sublimation pressures of solid chlorine are 352 Pa at -112 C and 35 Pa at -126.5 C. The vapor pressures of liquid Chlorine are 1590 Pa at -100 C and 7830 Pa at -80C
Explain why it is a good technique to slow the addition of NaOH titrant near the stoichiometric point.
A chemist prepares a sample of hydrogen bromide and finds that it occupies 258 mL at 60 degrees celsisus and 476 Torr. What volume would it occupy at 0 degrees celsisus at the same pressure? Answer in units of mL to 5 decimal places.
74.0 mL of a 1.80 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 179 mL of water. What is the final concentration.
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