Aluminum hydroxide is the active ingredient in Maalox, a remedy for upset stomachs. The Aluminum hydroxide (78 g/mole) reacts with stomach acid (HCl) to produce water and aluminum ions. A 10.00 mL sample of aluminum hydroxide was reacted with 20.00 mL of 0.2100M hydrochloric acid (HCl) and then the unreacted (leftover) HCl was titrated with sodium hydroxide. It required 9.78 mL of 0.2000M sodium hydroxide to reach the endpoint. Al(OH)3(s) + 3 HCl(aq) à3H2O(l) + Al+3+ 3 Cl-(aq) NaOH (aq) + HCl(aq) à3H2O(l) + Na+(aq)a. Describe in sentences how the chemist knew the end point had been reached. b. Describe in sentences, how you would use this information to determine the mass of aluminum hydroxide that is present in the 10.00 mL sample. c. What is the mass of the aluminum hydroxide present in the 10.00 mL sample

Question

Aluminum hydroxide is the active ingredient in Maalox, a remedy for upset stomachs. The Aluminum hydroxide (78 g/mole) reacts with stomach acid (HCl) to produce water and aluminum ions. A 10.00 mL sample of aluminum hydroxide was reacted with 20.00 mL of 0.2100M hydrochloric acid (HCl) and then the unreacted (leftover) HCl was titrated with sodium hydroxide. It required 9.78 mL of 0.2000M sodium hydroxide to reach the endpoint.

Al(OH)3(s) + 3 HCl(aq) à3H2O(l) + Al+3+ 3 Cl-(aq)

NaOH (aq) + HCl(aq) à3H2O(l) + Na+(aq)a. Describe in sentences how the chemist knew the end point had been reached.

b. Describe in sentences, how you would use this information to determine the mass of aluminum hydroxide that is present in the 10.00 mL sample.

c. What is the mass of the aluminum hydroxide present in the 10.00 mL sample

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