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What is the concentration of a 53.80 mL solution of HBr that is completely titrated by 35.00 mL of a 0.200 M NaOH solution?
A 0.415 g sample of KHP will be titrated with a NaOH solution with an assumed concentration of 0.100 M.
Calculate the volume of NaOH that should neutralize the KHP sample.
What are the concentrations of OH− and H+ (H+ is short for H3O+) in a 0.00070 M solution of Ba(OH)2 at 25 °C? Assume complete dissociation.
a. Define the terms viscosity, capillary action and surface tension.
b. How do the viscosity and surface tension of liquids change as intermolecular forces become stronger? Explain.
c. How do the viscosity and surface tension of liquids change as temperature increases? Explain.
d. Using the Kinetic Particulate theory explain the compressibility of liquids .
a. Distinguish between amorphous and crystalline solids, giving examples of each. How does the structure of each type of solid affect its properties?
b . Describe the lattice structure of crystalline, giant molecular and simple molecular solids giving examples of each type.
Calcium hydride, CaH2, reacts with water to form hydrogen gas:
CaH2 (s) + 2H2O (l) → Ca(OH)2 (aq) + 2H2 (g)
The reaction is sometimes used to inflate life rafts, weather balloons, and the like, where a simple, compact means of generating H2 is desired. How many grams of CaH2 are needed to generate 64.5 L of H2 gas if the pressure of H2 is 814 torr at 32 oC?
A solid compound of molar mass 100 g mol−1 was introduced into a container and heated
to 400 °C. When a hole of diameter 0.50 mm was opened in the container for 400 s, a mass loss of 285 mg was measured. Calculate the vapour pressure of the compound at 400 °C.
1.5 molar,
50 mL nitric acid solution
Volume of solute, mass solute, volume of water
32 He + 21 H
A solution that contains 12.6 g of a nonvolatile non-dissociating solute in 400 g of benzene freezes at 3.6°C. The normal freezing point of benzene is 5.5°C. What is the molar mass of the solute? (Kf for benzene = 4.96°C kg/mole)
