Day Pre-Laboratory Assignment 1. What precautions should be taken when using cob

Question

Day Pre-Laboratory Assignment 1. What precautions should be taken when using cobalt(I) nitrate in the laboratory? 2. What is a hydrate? 3. Calculate the mass percent nickel in nickelm sulfate hexahydrate, Ni O'6H2O, using a modi- fication of Equation 5 4. When nickel(ID) chloride hexahydrate, NiCI2- 6 H-O, dissolves in water, a green solution results. The of Ni ions in solution. The following data were collected for the absorbance of standard NiCl2-6H,O solutions in water Ni. g per 25 mL water 0.062 0.12 0.19 absorbance, Niclz 6H,O,g per 25 mL mater 0.25 0.50 0.75 1.00 0.21 0.44 0.66 0.86 (a) Use a modification of Equation 2 to complete the above data table by calculating the concentration of Ni, in g per 25 mL water, for the solution containing 1.00 g NiCl2 6H2O per 25 mL water

Explanation / Answer

cobalt (II) nitrate

it may cause irritation, it can produce toxic gases. It might react with other gases and produce fire. It may explode with mechanical impact.

An hydrate

It is a substance that contains water

Q3. Equation 5 has not been provided...

*please post other question separately

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