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Sum of coefficients C7H8 + O2 --> CO2 + H2O after balancing
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- Balance the following reaction in acidic solution. PbO2 + Hg → Hg, + Pb²+ Fill in the coefficients for the balanced overall equation. -- H* +- - ] PbO, - - v Hg,* +- - v H,0 Hg + v Pb2+ + v %3-The Nernst-Planck equation (shown below) describes the motion of a charged chemical species in a fluid. dC; z,FC; dv J; = - D; dx RT dx' What are the units for the ion flux J, where: zis the valence state of the ion (unitless) C is the concentration (mol/m³) Fis the Faraday constant (Coulomb/mol) Ris the ideal gas constant (kg m²/(s² mol °K)) Tis the temperature (K) dCi/dx is the concentration gradient (mol/m*) dV/dx is the electric potential gradient (V/m) D; is the diffusion coefficient (m²/s) Note that Coulomb is a unit of charge and V is volts where 1 V= 1 Joule/Coulomb)Six iron tablets containing FESO4-7H,0 were dissolved in 100-ml of 0.1 M HNO; with gentle heating. All of the Fe- is converted to Fe by the strong oxidizıng conditions. After the solution had cooled to room temperature 2.5-ml of 35wt% NH4OH was added. The precipitate Fe;O3-xH,O that was filtered weighed 0.345 g. Thermogravimetric analysis of the crude product showed a 10.5% weight loss below 150 C How much iron was in each of the tablets? Report the average mg-Fe per tablet?
- 50= 56 The follovaina fictitious unbalanced REDOX seaction is made weine teachers' intitials aud some the lo0) GRC axyğen. and Balance the followaig fictous REDOX reaetion tisus eu a fiece of haher 'and show All steps and Shoo All on CHO, + Sh h z ²+ LAcidic Medium Ch-+Sh Steh1 Zithese Show the 2itherr Show the oXIdatiom numbere ed each species-using the table below or va the arrois that he used in Vass (2) equation systes Readant landuct Ch ShКНР (ад) + NаОН (ад)- - NAKHP (aq) + H20 (1) Trial V; (mL) V; (mL) 33.87 45.73 2 A student masses out 1.019 grams of KHP, which is dissolved in 25.00 mL of DI water. This KHP solution is titrated with NAOH, as shown in the equation above. Calculate the molarity of the NaOH solution. RE FS F6 F7 FB F10: X C Balance the thre X https://app.101edu.co pre lab questions.pdf 42°F Mostly cloudy Esc ! 1 L xC In this experime X Lab #7 Redox T X M Inbox (4.311)-bx M (no subject) -sch X 63 Z @ 2 X Alt # 3 Complete and balance the following half-reaction in acidic solution. Be sure to include the proper phases for all species within the reaction. F3 E C $ 4 1 Q W ||||w|| AL DE F А S 11 + Reset R H₂O+ OH H 04 0³ 0² 0 O 0² 2 3 5 6 7 02 03 04 s ( V Dll % 5 Search T G Question 5 of 13 BrO (aq) → Br (aq) - 4 H Br ■ FG A 6 B Y H 06 *7 & 7 0₂ (s) 12+ 3+ 4+ H₂O e U N pre lab question X J 8 • x H₂O Presen 08 09 Do 9 (1) (g) (aq) 8 H O M 0 Home Delete ( K Aktiv Chemistry X 9 End O F10 I 0 L C For the galvanic X+ PgUp P Alt ^ D 4x PgDn Pg Dn 12 = ? I B h Sha 8 11/1 114
- In an oxidation-reduction reaction, 0.0450 mol of aqueous FeSO4 (source of Fe2+) reacts completely with 120.0 mL of an acidified aqueous solution of KMnO4 (source of MnO4-).5Fe2+(aq) + MnO4-(aq) + 8H+(aq) → 5Fe3+(aq) + Mn2+(aq) + 4H2O(ℓ)What is the molarity of the KMnO4 solution?Provide your answer in decimal notation, rounded to the appropriate number of significant figures.app.101edu.cо Question 14 of 15 Submit A solution of phosphoric acid (HPO,) with a known concentration of 0.250 M HAPPO is titrated with a 0.800 | M NaOH solution. How many mL of NaOH are required to reach the third equivalence point with a starting volume of 72.0 mL H,PO, according to the following balanced chemical equation: НРО, + 3 NaOH -> NA PO, + 3 Н.о 4 STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 0.800 6.75 x 104 2 1 0.250 0.0675 22.5 1000 3 67.5 7.50 72.0 0.001 43.2 L HAPPO mol NaOH М НАРРО g NaOH L NaOH mL H,PO, mL NaOH M NaOH g H PO mol HPO, +Hydrogen peroxide solutions can easily be decomposed by dust, trace amounts of metals or light. It istherefore necessary to periodically determine the purity of the peroxide solutions.This can be done via a redox titration as follows: The density of a particular surgical grade hydrogen peroxide solution is 1.11g.cm-3. Exactly 10 mL of this solution was pipetted and quantitatively transferred, along with a sufficientamount of a dilute sulphuric acid solution, into a 250.00 mL volumetric flask and made up to the mark. A 25.00 mL portion of this diluted solution is pipetted into a conical flask, and titrated with a0.372 M KMnO4 solution. The endpoint of the titration is determined when the colourless solution in the conical flask turns apersistent bright pink due to the presence of excess permanganate ions. The average titration value is 26.20 mL of the KMnO4 solution 1.Determine the percentage of the hydrogen peroxide in the solution sample.2. Naturally occurring manganese…
- Toxic Cr(VI) can be precipitated from an aqueous solution by bubbling SO2 through the solution. How much SO2 is required to treat 3.00 x 10° Lof 5.00x102 mMCr(VI)? 2Cro + 3S0, + 4H* Cr (SO,),+2H,0 2C:0- Cr,(SO,)3 + 2H,0 kgThe mercury in a 0.8142-g sample was precipitated with an excess of paraperiodic acid, H5IO6: 5 Hg 2+ + 2 H5IO6 ---> Hg5(IO6)2 (s) + 10 H + The precipitate (MW = 1448.8 g/mol) was filtered, washed free of precipitating agent, dried, and weighed, and 0.4114 g was recovered. Calculate the a) % Hg (200.6 g/mol) b) % Hg2Cl2 (472.1 g/mol)4. (cont.) (e) CO2 (g) + H20 (1) → 5. Balance the following equations; write the ionic equations and the corresponding balanced net ionic equation with the proper phase symbols (if different from the ionic equation). H2SO4 (aq) + NaOH (ag) > Na2SO4 (aq) + H20 (1) (a) (b) Al203 (s) + HCl (aq) → AIC13 (aq) + H20 (1) (c) H2SO3 (aq) КОН (aq) > K2SO3 (aq) + H20 (1) (d) HC2H3O2 (aq) + Ca(OH)2 (aq) →. Ca(C2H3O2)2 (aq) +. H20 (1) 55