Chemistry, 10.09.2019 05:30 Gabysh3794
2. a student was given an antacid tablet that contained the active ingredient calcium carbonate. the tablet weighed 4.2810 g. he dissolved it in 25.00 ml of 0.6200 m hcl and heated it gently for several minutes. after cooling, it took 37.12 ml of 0.1414 m naoh to titrate the excess acid to the phenolphthalein end point. a. write a balanced equation for the reaction of the antacid with hcl. b. write a balanced equation for the reaction of hcl with naoh. c. how many moles of the hcl were used to dissolve the antacid tablet? d. how many moles of naoh were needed to titrate the excess acid? e. how many moles of acid per gram of tablet were neutralized? f. how many grams of caco3 were in the antacid tablet?
Answers: 1
Chemistry, 22.06.2019 11:40
Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.
Answers: 3
Chemistry, 22.06.2019 15:00
According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?
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2. a student was given an antacid tablet that contained the active ingredient calcium carbonate. the...
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