Question

Please workout on paper.

1. On the web do a search for MSDS sodium sulfate, barium cholride, sodium chloride, and barium sulfate. Tell me their colors and solubilities.

2. How would an increase in the concentration of the reactants affect the moles of reactant?

3. Explain the role of limiting and excess reagents in any chmical experiment.

----------------------------------------------------------------------------------------------------------------------------------

1. Calculate the maxiumum volume in mL of 0.15 M HCl that each of the following antiacid formulations would be expected to neutralize. Assume complete neutralization.

a. A table containing 250 mg Al(OH)3 and 150 mg Mg(OH)2

b. A tablet containing 850 mg of CaCo3

2. A student is given an antiacid tablet that weighed 5.6832 g. The tablet was crushed and 4.3628 g of the antiacid was added to 200 mL of simulated stomach acid. This was allowed to react and then filtered. It was found that 250-mL of this partially neutralized stomach acid required 8.50 mL of a NaOH solution to titrate it to a methyl red endpoint. It took 21.54-mL of this NaOH solution to neutralize 25.00-mL of the original stomach acid.

a. How much of the "stomach acid" had been neutralized in the 25.00-mL sample which was titrated? (Show work.)

b. How much stomach acid was neutralized by the 4.3628 g sample used? (Show work.)

c. How much stomach acid would have been neutralized by the original 5.6832 g tablet? (Show work.)