5BL Lab 7 Assignment Submission Template - W24v3

Ksp for BaCrO4 is 1.17x10^-10

3. If AH*= 10 kcal/mol and AS = +10 eu, at what temperature will AG = 0? Show your work. %3D

Calculate e° values for the galvanic cells based on the following overall reactions. Assume that all concentrations are 1.0 M and that all partial pressures are 1.0 atm.

Ac₂0/NaOAc PhCO,H HNO,/H₂SO4 Now

(9.29 × 105/8)-20.81 =  with correct sig figs

Ksp value of PBCrO4 is 2.00x10^-14

O TPSS Bookmarks CHEMISTRY EOY BELL QUESTIONS - TUE - FRI - 3/23 - 3/26 CHEMISTRY I 12-7 (AARON JAMES, ID: 12390724) >Baso, (s)+ 2NaCI(aq) BaCl, (aq) + Na,S0, (aq)- 1.78 g 2.00 g 1.00 g A student mixes a barium chloride (BaCh) solution with a sodium sulfate (Na, SO) solution to make barium sulfate (BaSO4) precipitate. Some of the masses are shown below the equation. How many grams of Naz SO, are required to produce 2.00 grams of BaSO ? A 1.22 grams 4.78 grams C 0.22 grams 3.00 grams

f. + FO 0:

OWLV2 | Online teaching and X 0mySigTau xb Login | bartleby X M COMM.1113: FUND OF ORA X G what food has c - Google Se X + om/ilrm/takeAssignment/takeCovalentActivity.do?locator=assignment-take D [References] hotogray lenses incorporate small amounts of silver chloride in the glass of the lens. When light hits the AgCl particles, the following reaction occurs: hv AgCl Ag + Cl The silver metal that is formed causes the lenses to darken. The enthalpy change for this reaction is 2.90 × 10² kJ/mol. Assuming all this energy must be supplied by light, what is the maximum vavelength of light that can cause this reaction? Wavelength %3D nm Submit Answer Try Another Version 3 item attempts remaining Previous Next

2b) What is the primary consideration?

O (±)- (±)- (±)- -OME + (±)- ·}- H H. Il H- F HI H I H → ? LOMe H OMe

6ab answer both

Given the Ksp for Ag2CrO4 is equal to 1.20 x 10-12, calculate the percent error in your experimentally determined value for average Ksp (this will be an extremely large percentage – think about why).

Oxalic acid ionizes in two stages in aqueous solution: H2C2O4(aq) + H2O(€ )2H;0* (aq) + HC2O4 (aq) Kal = 5.9 × 10² HC,O, (aq) + H,O(e)2H;0*(aq) + C20?¯(aq) K22 = 6.4 × 10-5 Calculate the equilibrium concentrations of C¿O²¯, HC,O, H,C,O4, and OH- in a 0.10 M solution of sodium oxalate (Na,C¿O4).

overall aden fn tereactiorabwe! .20 what is te overall aae for tereactrobre! 200 0.00 8.00xl0 1. 0. 1000 200x1o? Trual A +BSAB On 12

k esc ~ 1. LiAlH4 2. Neutralizing work-up Select to Draw ! F1 F2 < O Q #つ 80 F3 NaCN, HCI Select to Draw $ 000 000 F4 % L F5 Problem 4 c MacBook Air < ( F6 8

* The indicator of Moher regent is KCr04. KMN04.

13. Mg(OH),(s) + 2HC{aq) → M9CL(aq) + 2H,0(1) The student found that 32.00 cm3 of 0 500moldm-3 HCIas needed to react with the Mg(OH2 in a 500 mg tablet. [1g = 1000 mg]. (i) Calculate the amount, in mol, of HCL used. amount = mol (i) Determine the amount, in mol, of Mg(OH), present in the tablet. amount = mol (iii) Determine the percentage by mass of Mg(OH), present in the tablet. answer = A carried out an to find by mass of in an (d) sell tablets to indigestion. indigestion tablet. The student reacted the tablet with dilute acid.

Nernst equation for pair IO3 |I': RT E = E° + nF In a(10;)a°(H*) a(I¯) RT a(IO;)a(H") E = E° + nF a(I") RT E = E° –- nF In a(IO; )a°(H*) a(I¯) nF a(IO,)a°(H*) lg RT E = E° + a(I¯)

NME2 1.) LIAIH (LAH) 2.) H*, H20 b.) HO. NME2 OH NM@2 NH2 2)

e teaching and le x .. Calendar m/ilrn/takeAssignment/takeCovalentActivity.do?locator=assignment-... <ΔΗ° this question. Given the standard enthalpy changes for the following two reactions: X (1) 2Zn(s) + O2(g) → 2ZnO(s) (2) Zn(s) + Cl₂ (g) → ZnCl₂ (s) KJ + Submit Answer 8 more group attempts remaining what is the standard enthalpy change for the reaction: (3) 2ZnCl₂ (s) + O₂(g) → 2ZnO(s) + 2Cl₂ (g) ΔΗ° =? Retry Entire Group ΔΗ° - 696.6 kJ AH = -415.0 kJ == Previous Next

■ True or False: in a TOF analyzer, a fragment of low mass reaches the detector first ▪ In GCMS when we know what analytes we are measuring we use not know what analytes are in the sample we use than scan. ▪ A) Scan; SIM ■ B)SIM; scan • C) SIM; SIM mode. When we do mode. SIM allows greater sensitivity

(4) Ag20, NH4OH H.

1. Provide necessary reagents to obtain the desired product.

HOCI(aq) + H2O(1) 2 H0*(aq) + CI"(aq) K1 = H,O*][OCI"] HOCI| Reaction 1: Reaction 2: 2 H20(1) 2 H30+(aq) + OH¯(ag) K2 = [H,O*][OH) Reaction 3: ОСr (ag) + H,о() — носі(аq) + он (ад) K3 =? Based on the equilibrium constants given above, which of the following gives the correct expression for the equilibrium constant for reaction 3? O K3 = B K3 = KỊK2 K1 K3 K3 = Kį K2

< Report - Gramma NGLSync X OWLv2 | X Cengage + entActivity.do?locator-assignment-take 0 How many amperes are required to deposit 0.291 grams of magnesium metal in 213 seconds, from a solution that contains Mg²+ ions. 2+ A Submit Answer Retry Entire Group 9 more group attempts remaining a 68°F Et OFE 1:37 PM 5/27/2022

RMR (kcal/day) = (9.99 x 79.5kg) + (6.25 X 182.9cm) - (4.92 x 35) + (166 x 1)- 161

10 Chem101 Question 3 of 10 Balance the following chemical equation (if necessary): BF (s) + Li:SO:(s) → LiF(s) + B:(SOs)»(s) 3 4 8 Os (s) (1) (g) (aq) LIF BF3 B:(SOs)s Li.SO. Reset •x H.O Delete

A 0.53 g sample containing KBr (MW=119) is dissolved in 50 mL of distilled water. Titrating with 0.04614 N AgNO3 requires 28.5 mL to reach the endpoint. Calculate the %w/w KBr in the sample. (Round-off your answer to 2-decimal places)   Answer = ____%

A OB О с OD CN NaOEt Br Ph CN CN CN HO B Ph CN Ph CN

KHP (aq)+NaOH (aq)-->NaKHP (aq)+H2O(l)   Trial  Vi (mL) Vf (mL) 1 36.19 48.56 2     3       A student masses out 1.096 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.

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