1-How much NaCl is required to prepare a 25 L solution of 0.1 M NaCl? (NaCl:58.5 g/mol)
2-Sometimes crystals do not form when a hot saturated solution is cooled. Please suggest a suitable way to initiate crystallization and explain it.
3-It is known that the vapor pressure of solid iodine does not exceed the triple point vapor pressure. According to the phase diagram of solid iodine, if the pressure on the solid iodine is decreased and the temperature is increased, what is the final state of solid iodine? Please explain.
4-a) Explain how you can determine the density of an unknown liquid using a pycnometer.
b) A golden-colored cube is handed to you. The person wants you to buy it for $100, saying that is a gold nugget. You pull out your old geology text and look up gold in the mineral table, and read its density as 19.3 g/cm3. You measure the edge of the cube and find as 2 cm on each side, and weights as 40 g. What is its density? Is it gold or not? Please explain.
5-Complete and equalize the reactions.
Hg22+ + Cl- →
Pb2+ + CrO42- →
Bi3+ + S2- →
6-Zinc metal reacts with excess HCl to produce hydrogen gas and zinc chloride. If 45.0 L of H2 gas was collected over water at 22 0C the total pressure was measured as 755 torr. How many grams of zinc was consumed in the reaction? (the vapour pressure of water at 22 0C is 19.8 torr) (equalize the equation) Zn:65.3 g/mol; R: 0.082 L.atm/mol.K
Zn + HCl H2 + ZnCl2
7-Draw a melting point determination apparatus and write the names of all parts of the apparatus.
8-How does the diffusion between ammonia and hydrochloride acid carry out? Please explain drawing set-up.
9-Write down the color of phenolphtalein in acidic and basic medium.
10-Simply draw a titration setup and name the components.
Step by step
Solved in 2 steps
