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Q: СО (аq) + Н,0 (1) —D НСО, (аq) + ОН (аq) [HCO, ][H2O] (Co ]H2O] Keq [HCO3][OH¯] (Co] Kea -eq [HCO3] ...
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![HF (aq) + H2O (1) = H;O† (aq) + F¯ (aq)
1
Kea
[H2O]
Keq = [H2O]
[H3O*][F]
[HF][H2O]
Kea
[HF]
Kea
[H30*][F]
[HF][H2O]
[H3O*][F¯]
Keq
[H3O+][F¯]
(HF]
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![NH3 (aq) + H2 (1) = NH4+ (aq) + OH (aq)
[NH†][OH¯]
[NH3]
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[NH3]
NH][OH]
Kea
1
Kea
[H2O]
NH3][H2O]
[NH|][OH]
Kea
NH][OH]
[NH3][H2O]
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- ksp CaCO3 3.36×10-9 Ca(OH)2 5.02×10-6A lead compound would be most promising if it had: A.KM = 4.7 × 10^5 M. B.K(I) = 1.5 × 10^-8 M. C.K(I)= 4.7 × 10^-5 M. D.K(I)= 4.7 × 10^5 M. E.K(I) = 1.5 × 10^8 M.Caffeine (C8H10O2N4 • H2O) has an absorbance of 0.510 at 272 nm and 1 cm optical path in1 mg / 100 mL concentration solutions. A 2.5 g sample of soluble coffee is diluted withwater to 500 mL. Take 250 mL, add 25.0 mL of 0.1 N H2SO4 and dilute it to 500 mL. Theabsorbance at 272 nm resulting in 0.415. A) Calculate the grams of caffeine per kg of soluble coffee in the sample. Themolar mass of caffeine is 212 g / mol.
- Sub parts D, E, F, Glattice 1Scenario In an investigation, lab groups combine two compounds, as shown below. Based on the data collected from all lab groups, you realize that one group’s data was not possible. Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) External Data Group Number Mass of Mg (g) Mass of HCl (g) Mass of MgCl2 (g) 1 5 15 20 2 5 15 17 3 5 15 21 4 5 15 20 5 5 15 19 Prompt Make a claim about which group’s data is not possible. Use evidence and scientific reasoning to support your claim. Include a rebuttal in your answer. Claim (1 sentence): ______________________________________________________________. Evidence 1 (2-3 sentences):…
- 2 CoCl2(aq) + 8 NH3(aq) + H2O2(aq) + 2 NH4Cl(aq) 2 [Co(NH3)5Cl]Cl2(s) + 2 H2O(l) In a 50-mL Erlenmeyer flask, cobalt(II) chloride hexahydrate (1.075 g), an aqueous solution of ammonia (1.2 mL, 15 M), ammonium chloride (0.505 g), and hydrogen peroxide (1.0 mL, 30.0% (w/w), density = 1.10 g/mL) were combined. After completion of the reaction, [Co(NH3)5Cl]Cl2 (0.450 g) was isolated. What was the percent yield of the product?Choose the correct answer choice. Given the statement below, which choice best accounts for these observations?The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μLμL of the sample and injecting it into a cuvette already containing 2.00 mLmL of water (total volume is 2.00 mLmL + 100.0 μLμL). The absorbance value of the diluted solution corresponded to a concentration of 7.71×10−6 M M . What was the concentration of the original solution? Express the concentration to three significant figures with the appropriate units.
- The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μL�L of the sample and injecting it into a cuvette already containing 2.00 mLmL of water (total volume is 2.00 mLmL + 100.0 μL�L). The absorbance value of the diluted solution corresponded to a concentration of 6.22×10−6 M � . What was the concentration of the original solution?The representations 14N or 15N give more information than simply the chemical symbolN. Explain?Please answer the last 3 parts: 1)R2BH 2)H2O2,HO-, H2SO4/ HgSO4, and 1) O3 2)H2O