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- Some sulfuric acid is spilled on a lab bench. You can neutralizethe acid by sprinkling sodium bicarbonate on it and thenmopping up the resulting solution. The sodium bicarbonatereacts with sulfuric acid according to:2 NaHCO31s2 + H2SO41aq2¡Na2SO41aq2 +2 H2O1l2 + 2 CO21g2Sodium bicarbonate is added until the fizzing due to the formationof CO21g2 stops. If 27 mL of 6.0 M H2SO4 was spilled,what is the minimum mass of NaHCO3 that must be addedto the spill to neutralize the acid?Consider the following reaction and the data provided.2 HgCl2(aq) + C2O4 2-(aq) ----> 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) Exp# [HgCl2] (M) [C2O42-] (M) Rate (M/s)1 0.164 0.15 3.2 x 10-52 0.164 0.45 2.9 x 10-43 0.082 0.45 1.4 x 10-44 0.246 0.15 4.8 x 10-5 What is the rate law? a) r = k[HgCl2] [C2O42-]2 b) r = k[HgCl2]2 [C2O42-]c) r = k[HgCl2] [C2O42-] d) r = k[HgCl2] [C2O42-]3Zn Zn2+(1.0M) Cu2+ (1.00M) Cu Ecell meausremet 1.029 Ecell, reaction quotient, Eºcell
- In a lab experiment, a student manages to dissolve 0.00250 moles of a mysterious compound AB into 1 L of water. The mysterious compound dissociates using the following equation: AB(S) ⇌ A(aq) + B(aq) What is the value of the Ksp for this compound? (Please provide your answer to 3 significant figures in scientific notation such as 1.23*10^-5.)For the reaction H2O(g) + Cl2O(g) → 2HCIO(9), you know S rxn and Sosys and S° of HCIO(g) and of H2O(g). Write an expression that can be used to determine Cl2O(g).For an autocatalytic reaction : A → B + …… where -d[A]/dt = k[A][B]. Assume that [B]o ≠0 Letting [A] = Ao – x and [B] = Bo +x -d[A]/dt = -d[Ao -x]/dt = dx/dt and dx/dt = k[Ao- x] [Bo + x] Show that [B] = {[A]o + [B]o } / [Ao/Bo] exp{- [A]o + [B]0 }kt + 1
- A chemist at a pharmaceutical company is measuring equilibriumconstants for reactions in which drug candidatemolecules bind to a protein involved in cancer. The drugmolecules bind the protein in a 1:1 ratio to form a drug–proteincomplex. The protein concentration in aqueous solutionat 25 °C is 1.50 x 10-6 M. Drug A is introduced into the proteinsolution at an initial concentration of 2.00 x 10-6 M.Drug B is introduced into a separate, identical protein solutionat an initial concentration of 2.00x 10-6 M. At equilibrium,the drug A–protein solution has an A–protein complexconcentration of 1.00 x 10-6 M, and the drug B solutionhas a B–protein complex concentration of 1.40 x 10-6 M.Calculate the Kc value for the A–protein binding reactionand for the B–protein binding reaction. Assuming that thedrug that binds more strongly will be more effective, whichdrug is the better choice for further research?What is the effect of catalyst on:(i) Gibbs energy (ΔG) and(ii) activation energy of a reaction?What are Pseudo unimolecular reactions? Explain with the help of a suitable example.
- The reaction: H2 + I2 = 2HI has an Eactivation = 2000 J/mol. Suppose that it has K=7.5x10-5 M-1s-1 at T=700K, find K at T=800K.This reaction must have a ∆G<0 at SATP: Xe(g)+F2(g)→XeF2(g) 2Na(s)+Cl2(g)→2NaCl(s) 2NaF(s)+I2(s)→2NaI(s)+F2(g) MgSO4(s)→Mg(s)+S(s)+2O2(g)Reaction of interest : S2O82-(aq) + 3I- (aq)→ 2SO42-(aq) + I3-(aq). rate= k[S2O82-]1[I-]1.