Explain why the mixture is buffered at pH 6 to 9?

Q: A physician has ordered 250 cc of 2.5 % (w/v) tincture of iodine. Iodine crystals and alcohol are av...

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Q: What is the freezing point depression of a 1.50 m solution of sucrose in water? No need to include t...

A: Given :- molality of sucrose solution = 1.50 m  To be calculated :- freezing point depression

Q: Glucose levels are routinely monitored in patients suffering from diabetes. The glucose concentratio...

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Q: Salt mixture: 2.64 g Mass of filter paper: 1.223 g Mass of filter paper and CaC2O4⋅H2O: 1.997 g M...

A: Limiting reactant is the one which is present is smaller amount in the reaction mixture and which de...

Q: thermometer A sample of polystyrene, which has a specific heat capacity of 1.880 J-g.°C, that contai...

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Q: For each of the following pairs or reactions, which is correctly labeled as having the larger equili...

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Q: Determine the pH c

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Q: Which one of the equations below represents what happens when HC,H3O2 is dissolved in water? O HC2H3...

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Q: 1. What are the uses of carbon-14 in the field of chemistry? 2. How can non-beneficial chemical reac...

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Q: If I need 166mL of 1 Molar solution of KBr how many milliliters of solution must I take from a 9M so...

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Q: A chemistry student needs 35.0 g of isopropenylbenzene for an experiment. He has available 150. g of...

A: Consider the given information is as follows; Mass of isopropenylbenzene = 150. g                   ...

Q: The concentration and absorbance data below were collected for compound X. A sample of compound X of...

A: Absorbance is related to concentration by the following relation. A=εclwhere,A=absorbancec=concentra...

Q: Butyric acid, C3H;COOH, has ionization constant of 1.54 x 10-5. a) Calculate the pH of 50.0 mL of a ...

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Q: Q12

A: moles of HF = molairty x volume (l) moles of HF = 0.25 x 1 moles of HF = 0.25 moles of NaF = 0.25 x ...

Q: Experimental Procedure for Part C: Add approximately 2-3 drops of each pair of reactants in the firs...

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Q: aed ane ay beatngs. The ut p esaCrand heendofeprt chan. hom the aan The temt be edinhe c The pprprat...

A: A question based on nomenclature that is to be accomplished.

Q: For the reaction, 3 O2(g)  ⇌ 2 O3(g), Kc equals 57 at 83. oC. Calculate the value of Kp

A: Given reaction:  3 O2(g)  ⇌ 2 O3(g) Given data:  Kc=57  T =83oC =(273+83)K                 = 356K Us...

Q: NH3 (g) + HCl (g) = NH4Cl   what type of reaction is this?   NH4Cl (s) is a solid

A: The given reaction is, NH3(g) + HCl(g) ---> NH4Cl(s)

Q: A metal salt with the formula MCı, crystallizes from water to form a solid with the composition MCl,...

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Q: Radioactive decay is a classic first order process. The half-life of 14C is 5,730 yr's. What is the ...

A: Given :-   half-life of 14C = 5730 yr's  reaction is first order To calculate :-  rate constant (k) 

Q: 1 point Hydrogen sulfide, H2S, is a foul-smelling gas. It burns to form sulfur dioxide 2H2S( g) + 30...

A: Mass of hydrogen sulphide = 26.7g  Molar mass of hydrogen Sulphide = 34.0g/mol  

Q: Describe the preparation and storage of each reagents. d. 2 L of 0.1 M NaOH e. 1.5 L of 0.04 M KMn...

A: It is important to determine the number of moles of given compounds in order to solve this problem. ...

Q: Are all atoms of an element exactly the same? Maybe No HUH? Yes

A: We need to determine if the atoms of same element are same. 

Q: 3) What would be a reason that someone would study the synthesis of these heterocyclic compounds?

A: Heterocyclic compounds are the cyclic organic compounds which contain at least one hetero atom, the ...

Q: Assign a structure to each of the following spectra. Choose from the following 5 carbon esters

A: Infrared spectroscopy is an analytical technique which aids in structural elucidation. It is based o...

Q: A 3.682 g sample solution. What is the pK* of the solution? O 1.20 O 0.85 O 2.50 1.35 « Previous Nex...

A: Mass of K2CO3 = 3.682 g Volume of solution = 375 ml  

Q: A metal salt with the formula MC12 crystallizes from water to form a solid with the composition MCI2...

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Q: Part B What is the value of A,G°? Express your answer with the appropriate units. HA ? J A,G° = 5.03...

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Q: Reaction: Combustion of CH4 with excess O2 mass = 1.6 g delta T = 1.3 oC  heat capacity of bomb c...

A: Mass of methane = 1.6 g ∆T, Change in temperature  = 1.3 oC  Heat capacity of bomb calorimeter = 11....

Q: QUESTION 12 What is the osmotic pressure (1) of a 1.25-M solution of a nonelectrolyte solution at 25...

A: Osmosis pressure is the pressure applied to stop the osmosis.

Q: A reaction, 2A  +  3B ------> 2 C, obeys the rate law: r = k[A][B]2. What is the order of this react...

A: Given :-  2A  +  3B ------> 2 C  rate law: r = k[A][B]2  To determine :-  overall reaction order 

Q: created Is C,H,Cl being created or destroyed by the chemical destroyed reaction? neither created nor...

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Q: Given the following sample concentrations and corresponding absorbances, construct a standard curve ...

A: We have sample concentration with their absorbance. We know that, Absorbance = molar extinction coef...

Q: For the next three questions, consider the reaction A(g) + 2B(g) → 2C(g) + 2D(g) and associated that...

A: Rate of the reaction depends on a number of factors as discussed in the following step. 

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 2....

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Q: -3 Question: We know the concentration of copper sulfate to be 0.01 mol dm from other experiment, an...

A: First we have to calculate the concentration on behalf of electrode potential.

Q: How would I find the pH of the two-component solution 0.115 M in NaCl and 9.56×10−2 M in KF?

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Q: Trypsin treatment decreases oxidative phosphorylation

A: In tis question we have to select true or false  on the basis of digarma, data and experiment with e...

Q: 5. Calculate both [H'] and [OH] for the following solutions at 25°C. Be sure to clearly identify all...

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Q: Part A Dinitrogen tetroxide decomposes to nitrogen dioxide: N204 (9) → 2 NO2 (9) A, H° = 55.3 kJ mol...

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Q: Titrating with 0.1 M NAOH we red 270 Buffer 1 Buffer 2 DI water 0.1 M acetic acid (mL) 10 35 0.5 M s...

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Q: Give the name of the structure shown O 1,2-dichlorobenzene o-dichlorobenzene O both names are correc...

A: Nomenclature of substituted benzene: 1) naming is done by placing the substituent as a prefix to the...

Q: For the reaction, 3 O2(g)  ⇌ 2 O3(g), Kc equals 57 at 83. oC. Calculate the value of Kp.

A: For a gaseous reaction, the equilibrium constant can be measured by the concentration of the reactan...

Q: Match the evidence and reasoning to support the claim: Light is a particle. Evidence: I. Light passi...

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Q: Gaseous methane (CH,) reacts with gaseous oxygen gas (o, to produce gaseous carbon dioxide (CO,) and...

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Q: 8. The density of nickel is 8.908 g/cm3. If the metallic radius of nickel is 125 pm, what is the str...

A: Concept  n= 1 then Simple cubic structure n= 2 then Body centered structure n = 4 then Face centered...

Q: H H-C-C=C H H-C-H Give the systematic name of the structure shown U -U-エ エーUーエ エ

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Q: Carl, a laboratory analyst for a mining company determined that copper is 3.21% of the ore that he i...

A: The percent of copper in the ore is 3.21%.

Q: Consider the gas-phase reaction, N2(g) + 3 H2(g) ⇌ 2 NH3 (g), for which Kp = 43 at 400 K. If the mix...

A: Given values-> Kp = 43 P(N2) = 0.3 bar P(H2)=0.5 bar P(NH3) = 1.5 bar    

Q: Determine the multiplicity of each signal in the expected 'H NMR spectrum of the following compound....

A: NMR spectroscopy is branch of chemistry which involves identification of compound on the basis of NM...

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.