Chemistry, 15.04.2022 19:20 ashlee7877
A student pipetted exactly 50.00 mL of 0.1038 M HCl into a 250-mL Erlenmeyer flask
containing 0.3735 g of an antacid tablet. The solution was heated and boiled to remove any
CO2. Approximately 25 mL of water and three drops of phenolphthalein indicator was added
to the Erlenmeyer flask containing the HCl and antacid tablet. A 50 mL buret was rinsed and
filled with a 0.1017 M NaOH solution. The initial volume of the buret was read and recorded
as 2.30 mL. The NaOH solution was carefully added to the antacid/HCl solution until a
permanent very slight pink coloration was noticed. The buret was read again and recorded as
22.82 mL. Calculate the acid equivalent (g HCl/g antacid) of the antacid tablet.
Answers: 1
Chemistry, 22.06.2019 07:20, rex1578
Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic
Answers: 1
A student pipetted exactly 50.00 mL of 0.1038 M HCl into a 250-mL Erlenmeyer flask
containing 0.37...
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