A B D E Which of the figures above represents how you expect the conductivity of an aqueous solution of SDS (CH3(CH2)110SO3NA) to vary with concentration. (The y-axis is the conductivity and the x-axis is concentration in each case above.)
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- In which solution will NH,NO, be most soluble in? 1.0 Μ ΗΝO; О 1.0 м КОН O 1.0 M NaCl O 1.0 M NH4B1 Ο 1.0 ΜΚΝ, 1.0 Μ KNΟ;Rich LTI e Post Attendee - Zoom M MyOpenMath - MAT 129 enow.com/ilrn/takeAssignment/takeCovalentActivity.do?locator=Dassignment-take [References] Use the References to access important values if neede Match the following aqueous solutions with the appropriate letter from the column on the right. |1. 0.163 m Mn(CH;COO)2 A. Highest boiling point 2. 0.153 m Cul2 B. Second highest boiling point 3. 8.60×102 m Cr2(SO4)3 C. Third highest boiling point 4. 0.400 m Sucrose (nonelectrolyte) D. Lowest boiling point Submit Answer Try Another Version 2 item attempts remaining VisitedH1ll calculate the mass pezcentage salution containiny Naz so, in a of Na, 5O in lof 443, of water
- (a) What is the percentage concentration of a 1:10,000 solution of epinephrine HCl (MW 219.20)? (b) If 50 mL of this solution was prepared, what would be the molarity (M)? (c) What is the milligram per deciliter concentration?A fertilizer railroad car carrying 34,300 gallons of commercialaqueous ammonia (30% ammonia by mass)tips over and spills. The density of the aqueous ammoniasolution is 0.88 g>cm3. What mass of citric acid,C(OH21COOH21CH2COOH22, (which contains three acidicprotons) is required to neutralize the spill? 1 gallon = 3.785 L.High-temperature superconducting oxides hold great promise in the utility, transportation, and computer industries.(a) One superconductor is La₂₋ₓSrₓCuO4. Calculate the molarmasses of this oxide when x0, x1, and x 0.163.(b) Another common superconducting oxide is made by heatinga mixture of barium carbonate, copper(II) oxide, and yttrium(III)oxide, followed by further heating in O2: 4BaCO₃(s) +6CuO(s) +Y₂O₃(s)2YBa₂Cu₃O₆.₅(s)+ 4CO₂(g)2YBa₂Cu₃O₆.₅s) +1/2O₂(g)→2YBa₂Cu₃O₇(s) When equal masses of the three reactants are heated, which re-actant is limiting?(c) After the product in part (b) is removed, what is the mass per-cent of each reactant in the remaining solid mixture?
- iv. Does sucrosebehavelikeastrong electrolyte, weakelectrolyte, ornonelectrolyte whenitis dissolved in water? What species are present inC12H22O11(ag)?an ecobotanist separates the components of a tropical barkextract by chromatography. She discovers a large proportion ofquinidine, a dextrorotatory isomer of quinine used for control of arrhythmic heartbeat. Quinidine has two basic nitrogens (K(b1)=4.0X10⁻⁶ and K(b2)=1.0X10⁻¹⁰). To measure theconcentration, she carries out a titration. Because of the low solubility of quinidine, she first protonates both nitrogens withexcess HCl and titrates the acidified solution with standardized base. A 33.85-mg sample of quinidine (M=324.41g/mol) isacidified with 6.55 mL of 0.150 MHCl.(c) What is the pH at the first equivalence point?a) Calculate the normality and formality of a potassium permanganate solution of which 35.00 mL are equivalent to 0.2500 g of 98% pure calcium oxalate. b. How many microliters of a commercial hydrogen peroxide solution (assume the solution is approximately 3.5% w / v) will react with 35.00 mL of a solution whose formality was obtained in the previous part?
- An ecobotanist separates the components of a tropical barkextract by chromatography. She discovers a large proportion ofquinidine, a dextrorotatory isomer of quinine used for control of arrhythmic heartbeat. Quinidine has two basic nitrogens (K(b1)=4.0X10⁻⁶ and K(b2)=1.0X10⁻¹⁰). To measure theconcentration, she carries out a titration. Because of the low solubility of quinidine, she first protonates both nitrogens withexcess HCl and titrates the acidified solution with standardized base. A 33.85-mg sample of quinidine (M=324.41g/mol) isacidified with 6.55 mL of 0.150 MHCl.(a) How many milliliters of 0.0133 MNaOH are needed to titrate the excess HCl?(b) How many additional milliliters of titrant are needed to reach the first equivalence point of quinidine dihydrochloride?(c) What is the pH at the first equivalence point?Which compound should have the greatest molar conductivity? KBr CCola O BaBr2 GaBr3 O PbBr4 O They should have similar conductivities.Which has the highest conductivity and why? 0.1 M BaCl2 or 0.1 M NaCl.