Question 1: Each 5-mL teaspoon full of Extra Strength Maalox Plus contains 450 m

Question

Question 1: Each 5-mL teaspoon full of Extra Strength Maalox Plus contains 450 mg of magnesium hydroxide and 500 mg of aluminum hydroxide. How many moles of hydronium ion are neutralized by one teaspoon full of Extra Strenght Maalox Plus?

Question 2: In a lab experiment, we're required to heat an antacid solution to a gentle boil in order to remove all of the CO2 gas.

Our pre-lab question asks "If the solution is Philips' Milk of Magnesia (Active ingrediant Mg(OH)2) you don't need to heat the experiment, but if the sample is Mylanta (active incrediant Mg(OH)2 and Al(OH)3), the solution must be heated. Explain the difference in experimental procedures. "

Please help!

Let me know if you need more information and I'll try to find it in my lab manuel.

Explanation / Answer

mol Mg(OH)2 = 0.450g (1mol/ 58.31g) = 7.717E-3 mol

7.717E-3 x 2 = 0.01543 mol OH-

mol Al(OH)3 = 0.500g (1mol/ 77.98g) = 6.412E-3 mol

6.412E-3 x 3 = 0.01924 mol OH-

Total mol of OH- = 0.01543 + 0.01924 = 0.03467 mol OH-

1 mol OH- : 1 mol H3O+ = 0.03467 mol

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