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General Chemistry: Principles and Modern Applications (11th Edition)
- out of f A relatively flat region of a pH curve where a nearly constant pH is maintained. The point during a titration when there is a sudden change in some observable property of the solut conductivity. With sufficient oxygen present, pentane burns according to the reaction: C5H12(l) + 802(g) → 5CO₂(g) + 6H₂O(g) What volume (in L) of oxygen at SATP is required to produce 48.0 L of CO₂(g) at SATP? mmmm Express your answer with three significant digits. Do not include units! L A sample of rainwater is poured into five test tubes. A different indicator is Proctorio is sharin table.arrow_forwardThe electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb.Rank from brightest to dimmest bulb. To rank items as equivalent, overlap them.HF, CH3OH, KI, Al(NO3)3arrow_forward3f?arrow_forward
- A 1.576 g primary-standard grade Na2CO3 (MW = 105.99 g/mol) was used to standardize an HCl solution. Solve for the molarity of HCl if 16.56 mL of HCl was used to reach the endpoint.arrow_forwardRESULTS AND CALCULATIONS: Standardization of NaOH solution 1.trial 2.trial 15.0 mL of 0.1015 M HCl + 15.3 mL NaOH 15.0 mL of 0.1015 M HCl + 15.2 mL NaOH Calculation of the average molarity of NaOH solution;arrow_forwardIbuprofen (also known as Brufen) is an analgesic (pain killer) and anti-inflammatory drug. It is a weak carboxylic acid (Chemical Formula: C12H17C00H; K = 1.2 x 10-5). A Medical student from Lusaka Apex Medical University (LAMU) prepared a 0.4 M solution of Brufen to give to an accident victim with minor injuries but in a lot of pain. on i. Write a reaction equation showing how Brufen ionizes in water. ii. Write the acid ionization constant expression for Brufen iii. Calculate the percent ionization of Brufen in water Select one: O A C12H17COOH(ag) + H2OM → C12H17CO0'(aq) + H3O*(aq)} K = [C;;H1¬CO0"][H30*]. [C1,H17COOH][H=0] 0.55% %3D OB. + C12COO(ag) + H3O*(aq); K= [C1;;H17C00"][H,o*j. [C2H17COOH] C12COOH(a) + H2O¶ 0.55% C12COOH(ag) + H2O) → C12COO (aq) + H30*(aq), K = [C1;H3;C00"][H30*]. [C,2H17COOH][H=0] 0.0022 %3D [CH1,CO0"][H30*]. [C1H17COOH] Go O D. C12H17COOH + H2O C12H17CO0* + H3O*|K = 0.55% %3Darrow_forward
- Calculate mEq/L SO_4^2 of 0.0250 M solution of SO_4^2arrow_forwardA 1.00 liter solution contains 0.58 moles hypochlorous acid and 0.45 moles sodium hypochlorite . If 0.22 moles of nitric acid are added to this system, indicate whether the following statements are true or false. (Assume that the volume does not change upon the addition of nitric acid.) VA. The number of moles of HCIO will remain the same. vB. The number of moles of CIO" will decrease. vC. The equilibrium concentration of H30+ will increase. D. The pH will remain the same. vE. The ratio of [HCIO] / [CIO¯] will remain the same.arrow_forwardAn intrinsic property is one a That is dependent on how much of the material is present That is analogous to the flammability of any substance That is analogous to the flammability of any substance That only changes withaltitude How many moles are in 20 mg of steric acid, CH_3(CH_2)_{16}COOH?arrow_forward
- 1.00 mL of a 3.55x10^-4 M solution of oleic acid is diluted with 9.00 mL of petroleum ether, forming solution A. Then 2.00 mL of solution A is diluted with 8.00 mL of petroleum ether, forming solution B. What is the concentration of solution B?arrow_forward10.) Calculate the activity coefficient of K* in 0.050 M KNO3.arrow_forwardWould a 0.85 M soln of HPO4-2 be considered strong/weak and concentrated/dilute? A. concentrated, strong B. dilute, strong C. dilute, weak D. concentrated, weakarrow_forward
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