Question

1) In the laboratory you are asked to make a 0.259 m barium iodide solution using 355 grams of water.
How many grams of barium iodide should you add?
______grams.

2)The freezing point of water is 0.00°C at 1 atmosphere.
If 11.49 grams of manganese(II) nitrate, (179.0 g/mol), are dissolved in 228.2 grams of water ...

The molality of the solution is ______ m.

The freezing point of the solution is ______ °C.

3) The freezing point of benzene C₆H₆ is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is testosterone .

How many grams of testosterone, C₁₉H₂₈O₂ (288.4 g/mol), must be dissolved in 256.0 grams of benzene to reduce the freezing point by 0.500°C ?

_____ g testosterone.

4)The freezing point of water H₂O is 0.00°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol).
If 11.49 grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), are dissolved in 228.2 grams of water ...
The molality of the solution is _____ m.

The freezing point of the solution is ______°C.

Answer 1