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Chemistry

11/11/23

Rank the following acids in order of increasing equivalence point pH if titrated with NaOH.

For the following scenarios, consider that you have equal volumes and concentrations of the acids in Part 1, and that you have equal volumes and concentrations of the bases in Part 2.A. Rank the... more

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Chemistry

11/11/23

Nernst equation chemistry of electrochemical cell

Calculate the reaction constant of an electrochemical cell at 298K using the Nernst equation. All concentrations of ions are standard at 1.00M:1.) Ca +Cu^+2 < Ca^+2 + Cu( I am not sure which... more

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Chemistry

11/11/23

Calorimetry - Chemistry

Calculate the final temperature of the system: A 50.0 gram sample of water initially at 100 °C and a 100 gram sample initially at 24.6 °C are mixed. The specific heat of water is 4.184 J/g°C. °C

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Chemistry

11/11/23

Write the net ionic equation for the reaction of copper metal with aqueous silver nitrate. Include physical states.

Write the net ionic equation for the reaction of copper metal with aqueous silver nitrate. Include physical states.Molecular equation:?

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Chemistry

11/11/23

Enter the oxidation number of one atom of each element in each reactant and product

Enter the oxidation number of one atom of each element in each reactant and productCH4(g)+2 O2(g)---->CO2(g)+2 H2 O(g) C in CH4 H in CH4 O in O2 C in CO2 O in CO2 H in H2O O in H2O

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Chemistry

11/11/23

Write molecular equations to describe the following oxidation-reduction reactions. Include phase symbols, and identify the species that is oxidized and reduced in each reaction.

Write molecular equations to describe the following oxidation-reduction reactions. Include phase symbols, and identify the species that is oxidized and reduced in each reaction. Solid iron metal... more

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Chemistry

11/11/23

Write two half-reactions to describe each of these metal displacement reactions. Include phase symbols.

Write two half-reactions to describe each of these metal displacement reactions. Include phase symbols.Cu(s)+2 AuCl(aq)--->CuCl2 (aq)+2 Au(s)oxidation half-reaction?reduction half-reaction:?

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Chemistry

11/11/23

Calculate the pH of a solution that is 0.232 M acetic acid and 0.183 M sodium acetate. The Ka of acetic acid is 1.76×10–5 at 25°C. What is the pH of this mixture at 0°C? (At 0°C, Ka = 1.64x10-5)

A. pH at 25°C = B. pH at 0°C = 2 decimal places

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Chemistry

11/11/23

What volume of 0.011 M HCl is required to titrate a solution containing 257 mL of 0.011 M Na2CO3 and 257 mL of 0.011 M HCO3- ?

The common-ion effect plays a key role in controlling the pH of solutions that contain both a weak acid and its conjugate base.

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Chemistry

11/11/23

What is the pH of a solution that results from mixing together equal volumes of a 0.070 M solution of ammonia and a 0.035 M solution of hydrochloric acid? (pKa of NH4+ = 9.25)

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Chemistry

11/11/23

Calculate the pH at 25°C of 200.0 mL of a buffer solution that is 0.460 M NH4Cl and 0.460 M NH3 before and after the addition of 2.70 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75)

A. pH before =B. pH after =

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Chemistry

11/11/23

Calculate the pH of a buffer containing 0.182 M HNO2 and 0.170 M NaNO2 at 25°C. The pKa value for HNO2 is 3.40.

An acid–base buffer is a solution that resists changes in pH when a small amount of strong acid or base is added. Acid–base buffers typically contain a weak acid and its conjugate base.

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Chemistry

11/11/23

What is the pH at the equivalence point when 25.0 mL of a 0.275 M solution of acetic acid (CH3COOH) is titrated with 0.100 M NaOH to its end point?

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Chemistry Organic Chemistry

11/11/23

2,2-dimethylhexane has a heat of formation of -186.9kJ/mol.

2,2-dimethylhexane has a heat of formation of -186.9kJ/mol. Assuming an isolated system that uses this substance as a fuel, what mass of the substance would be required to heat 335g of water from... more

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Chemistry Organic Chemistry

11/11/23

Describe a process that could be used to synthesize 1-bromopropane from propan-2-ol. Show all relevant chemical reactions and name all reactants and products used

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Chemistry Organic Chemistry

11/11/23

Describe how 2-ethyl-1-methylpentyl 2,2-dimethylpentanoate could be synthesized using a carboxylic acid and alcohol. Show all relevant chemical reactions, and name all reactant and products used

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Chemistry

11/10/23

Determine the oxidation number(oxidation state) of each element in the three compounds.

Determine the oxidation number(oxidation state) of each element in the three compounds.CuCO3 Cu:C:O:NH4ClN:H:Cl:(NH4)2CrO4 N:H:Cr:O:

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Chemistry

11/10/23

Correctly expressed half-reactions

Correctly expressed half-reactions include which of the following? I.CrO4 2-+8H+ + 6e-→Cr3+ + 4H2O II.I- + 6OH- → IO3- + 3H2O + 6eIII.MnO4- + 2H2O + 3e- → MnO2 + 4OH-A.I only B.III... more

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Chemistry

11/10/23

The Ksp of strontium carbonate, SrCO3, is 5.60 x 10-10. Calculate the molar solubility, S, of this compound. S=? M

The Ksp of strontium carbonate, SrCO3, is 5.60 x 10-10. Calculate the molar solubility, S, of this compound.S=? M

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Chemistry

11/10/23

What is the value of the equilibrium constant at this temperature?

The elementary reaction2 H2 O(g) ⇌ 2 H2 (g) + O2 (g)proceeds at a certain temperature until the partial pressures of H2 O, H2, and O2 reach 0.0700 atm, 0.00700 atm, and 0.00250 atm, respectively.... more

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Chemistry

11/10/23

What is the equilibrium constant, Ksp, of the generic salt AB(s)?

At 25 degrees C, an aqueous solution has an equilibrium concentration of 0.00295 M for a generic cation, A+ (aq), and 0.00295 M for a generic anion, B- (aq). What is the equilibrium constant, Ksp,... more

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Chemistry

11/09/23

Calculate the percent yield from the reaction below.

Na2CO3 + CaCl2 ---- > NaCl + CaCO3If you reacted 10.1 grams of Na2CO3 with CaCl2 and you collected 5.60 grams of CaCO3, what is your percent yield?

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Chemistry Biochemistry

11/09/23

biochemical calculation

The measured volumes of hydrogen (4 dm3) and chlorine (3 dm3) were mixed together, then the reaction was started. Calculate the volume of the gases after the reaction.

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Chemistry Biochemistry

11/09/23

biochemical calculation please help me

Find the molar ratio at which N2O and N2O3 were mixed, if we know that 11 dm3 of this mixture reacts with 27 dm3 of hydrogen, and that nitrogen and water are the only products of this reaction.... more

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Chemistry

11/09/23

What is the value of the equilibrium constant at this temperate for the reaction of SO2 with N2O to form SO3 and N2?

At a certain temperature, a 25.5 -L container holds four gases in equilibrium. Their masses are 3.5 g SO3, 4.6 g SO2 , 14.3 g N2, and 0.98 g N2O.What is the value of the equilibrium constant at... more

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Answers •1

Rank the following acids in order of increasing equivalence point pH if titrated with NaOH.

Nernst equation chemistry of electrochemical cell

Calorimetry - Chemistry

Write the net ionic equation for the reaction of copper metal with aqueous silver nitrate. Include physical states.

Enter the oxidation number of one atom of each element in each reactant and product

Write molecular equations to describe the following oxidation-reduction reactions. Include phase symbols, and identify the species that is oxidized and reduced in each reaction.

Write two half-reactions to describe each of these metal displacement reactions. Include phase symbols.

Calculate the pH of a solution that is 0.232 M acetic acid and 0.183 M sodium acetate. The Ka of acetic acid is 1.76×10–5 at 25°C. What is the pH of this mixture at 0°C? (At 0°C, Ka = 1.64x10-5)

What volume of 0.011 M HCl is required to titrate a solution containing 257 mL of 0.011 M Na2CO3 and 257 mL of 0.011 M HCO3- ?

What is the pH of a solution that results from mixing together equal volumes of a 0.070 M solution of ammonia and a 0.035 M solution of hydrochloric acid? (pKa of NH4+ = 9.25)

Calculate the pH at 25°C of 200.0 mL of a buffer solution that is 0.460 M NH4Cl and 0.460 M NH3 before and after the addition of 2.70 mL of 6.0 M HNO3. (The pKa for NH4+ = 9.75)

Calculate the pH of a buffer containing 0.182 M HNO2 and 0.170 M NaNO2 at 25°C. The pKa value for HNO2 is 3.40.

What is the pH at the equivalence point when 25.0 mL of a 0.275 M solution of acetic acid (CH3COOH) is titrated with 0.100 M NaOH to its end point?

2,2-dimethylhexane has a heat of formation of -186.9kJ/mol.

Describe a process that could be used to synthesize 1-bromopropane from propan-2-ol. Show all relevant chemical reactions and name all reactants and products used

Describe how 2-ethyl-1-methylpentyl 2,2-dimethylpentanoate could be synthesized using a carboxylic acid and alcohol. Show all relevant chemical reactions, and name all reactant and products used

Determine the oxidation number(oxidation state) of each element in the three compounds.

Correctly expressed half-reactions

The Ksp of strontium carbonate, SrCO3, is 5.60 x 10-10. Calculate the molar solubility, S, of this compound. S=? M

What is the value of the equilibrium constant at this temperature?

What is the equilibrium constant, Ksp, of the generic salt AB(s)?

Calculate the percent yield from the reaction below.

biochemical calculation

biochemical calculation please help me

What is the value of the equilibrium constant at this temperate for the reaction of SO2 with N2O to form SO3 and N2?

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