NE NE OCH3 NaOH(aq) LOEt NaOEt, EtOH 3. H,O heat Ethanolic NaOH 1. CH,MgBr (excess) et₂O 2. H₂O 3. PCC in CH₂Cl₂

The fizz produced when an Alka-Seltzer tablet is dissolvedin water is due to the reaction between sodium bicarbonate(NaHCO3) and citric acid (H3C6H5O72)3 NaHCO3(aq) + H3C6H5O7(aq)-------->3 CO2(g) + 3H2O(l) + Na3C6H5O7(aq) In a certain experiment 1.00 g of sodium bicarbonate and1.00 g of citric acid are allowed to react. The actual yield of CO2 was 0.436 g. a.) What is the theoretical yield of CO2? b.) What is the % yield?

The compound sodium thiosulfate pentahydrate, Na2S2 O3-5H2O, is important commercially to the photography business as "hypo," because it has the ability to dissolve unreacted silver salts from photographic film during development. Sodium thiosulfate pentahydrate can be produced by boiling elemental sulfur in an aqueous solution of sodium sulfite. S8 (s) + Na2 SO3 (aq) + H2O(1) → Na2 S2 O3-5H2 O(s) (unbalanced) What is the theoretical yield of sodium thiosulfate pentahydrate when 3.25 g of sulfur is boiled with 13.1 g of sodium sulfite? Sodium thiosulfate pentahydrate is very soluble in water. What is the percent yield of the synthesis if a student doing this experiment is able to isolate (collect) only 5.26 g of the product?

Much of the sulfur used in the United States comes from the hydrogen sulfide contaminant that makes "sour" natural gas smell bad. Hydrogen sulfide is separated from the other components of natural gas mostly by taking advantage of its acid-base reaction with aqueous ethanolamine: HO(CH,),NH,(aq)+H,S(g) → HO(CH,),NH,(aq)+HS (aq) Suppose an engineer decides to study the rate of this reaction. She prepares four reaction vessels with 167.6 mL of ethanolamine solution and 20.9 g of hydrogen sulfide gas each. The volume and temperature of each vessel is shown in the table below. Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. vessel volume temperature A B C D 5.0 L 5.0 L 5.0 L 5.0 L 49, °C 48. °C 51. °C 50. °C X initial rate of…

14. Complete

6. Count the number of elements on each side of the equation & write the total number down below. 3NAHCO;(aq) + C,H,OH(COOH);(aq)-C3H,OH(COONA)3(aq) + 3H,0(1) + 3CO,(2) Reactants Products Hydrogen Окудеn Carbon Sodium Hydrogen Окудеn Carbon Sodium

Complete the reactions below with appropriate reaction conditions, make sure that your set of reaction conditions produce the indicated product as a major product. Please indicate clearly whether the reaction conditions occur in one or several distinct steps. Reaction Conditions Reactant Product a) Br b) OH c) HO

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1. Write the balanced chemical equations for the following reactions and identify the type of the reactions. (i) K,SO,(aq) + AICI;(aq) → Al;(SO);(aq) + KCI(aq) Туре: (ii) CH;OH(1) + O2(g) → CO2(g) + H;O(g) Туре:

Which one of the following is correct? O a. 2H20(8)→02(g) + 4H*(aq) + 4e redox reaction O b. Cr,0,2 (aq) + 20H¯(aq) → 2Cro,2 (aq) + H2O(t) redox reaction O c. NH3(g) + HCI(g) → NH4CI(s) precipitation reaction O d. 2H202-2H,0(t) + O2(g) redox reaction O e. NH3(aq) + HCI(aq) → NH4CI(aq) neutralization reaction