Chem Lab

Introduction:

In this experiment, calcium chloride was reacted with sodium hydroxide accord to the following fit equation:
CaCl2(aq) + 2NaOH(aq) Ca(OH)2(s) +2NaCl(aq)
The purpose doing this reaction was to exercise stoichiometry calculations. Stoichiometry is the process of keeping track of the quantitative relationship between reactants and produces in a reaction. In a stoichiometry fuss, the coefficients in the balanced equation provide the correction number of moles of each substances that is infallible to complete the reaction. Often in a reaction, there is a narrowing reagent since the exact proportions of moles of the reactants are not present. Thus, a limiting reagent is the reactant that determines how far the reaction will go before do the it to stop since there are fewer moles of it than the proportion requires.
When playing a limiting reagent stoichiometry problem, one is given the starting amounts of the reactants which should be converted into moles. Next, the problem should be treated as two separate problems, and each amount of moles of reactants should be multiplied by the proportion of product to reactant. This will solve for the amount of product that can be made with each of the two diametrical reactants.



The correct amount of product that can be produced is the littler of the two values since that reactant limits the production of product.
In this lab, the theoretical break down of the equation is found by using the type of stoichiometry problem mentioned above, and the actual stand is how much product is actually form in the lab. The percent yield, a comparison between theoretical and actual yield, is than found using the equation:
Percent yield = (actual yield / theoretical yield) X 100%
Data and Calculations:
balance Equation:

CaCl2(aq) + 2NaOH(aq) Ca(OH)2(s) +2NaCl(aq)

Table 1: Results
Volume of CaCl2 Added (mL)| Volume of NaOH Added (mL)| potful of Ca(OH)2 Obtained (grams)|
5.00| 2.97| .26|...If you want to get a full essay, order it on our website: Orderessay



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