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The Home Scientist
Jan 4, 2013, 11:52:01 AM1/4/13
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On Friday, January 4, 2013 10:52:49 AM UTC-5, TK Cochran wrote:
Pellets are fine. During the lab, you make a solution of 8.00 g of sodium hydroxide in 10 mL of water. The actual mass of sodium hydroxide isn't important as long as it's close and you know it precisely. For example, if you end up with 7.86 g, that's fine, but you'll need that actual mass to do the calculations later. The amount of water isn't critical at all. About 11 g of sodium hydroxide will dissolve in 10 mL of water, so the lab instructions make a very concentrated solution. If you want to use more water, that's fine.
I am wanting to do the Chemistry Lab Experiment 9.4: Stoichiometry of a Double Displacement Reaction. I have NaOH Pellets and wasn't sure how to substitute these for the 8.00 g of NaOH(aq). Can I use them dry and if so, how much? If I need to make an aqueous solution, what would the ratio/percent be for this lab?
Pellets are fine. During the lab, you make a solution of 8.00 g of sodium hydroxide in 10 mL of water. The actual mass of sodium hydroxide isn't important as long as it's close and you know it precisely. For example, if you end up with 7.86 g, that's fine, but you'll need that actual mass to do the calculations later. The amount of water isn't critical at all. About 11 g of sodium hydroxide will dissolve in 10 mL of water, so the lab instructions make a very concentrated solution. If you want to use more water, that's fine.
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