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What is the electrical conductivity of a solution containing 0.1 M sodium chloride and 0.2 M potassium nitrate at room temperature (25 °C) and a cell constant of 1.0 cm-1?

asked Mar 1 in Inorganic Chemistry by TheScientist (138k points)

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What is the activation energy for the electrochemical reaction that occurs when zinc metal is oxidized to form Zn2+ ions in a solution containing HCl? Calculate the activation energy at 25°C from the experimental data obtained from the Tafel plot.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What specific measures can be taken by the chemical industry to prioritize environmental chemistry and reduce the negative impact of their activities on the environment?

asked Mar 1 in Chemical education by TheScientist (138k points)

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What is the enthalpy change of hydrolysis for 10 grams of sucrose (C12H22O11) dissolved in 100 mL of water at 25°C? Given that the enthalpy of hydrolysis for sucrose is -564.8 kJ/mol.

asked Mar 1 in ThermoChemistry by TheScientist (138k points)

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What is the efficiency of an electrochemical cell in which a current of 1.5 A is passed for 2 hours between two electrodes, given that the potential difference between the electrodes is 1.5 V and the total energy consumed is 5400 Joules?

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What are the factors that influence the formation and stability of protein-protein interactions and complexes? How can we measure and analyze these interactions?

asked Mar 1 in BioChemistry by TheScientist (138k points)

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What is the zeta potential of colloidal silver nanoparticles in aqueous solution at pH 7 and how does it vary with ionic strength?

asked Feb 28 in Surface Chemistry by TheScientist (138k points)

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Sure! Here's a precise problem:Calculate the cell potential for the following electrochemical reaction: Fe(s) + Cu2+(aq) → Fe2+(aq) + Cu(s) Assume that the concentrations of Fe2+(aq) and Cu2+(aq) are both 1.00 M and the temperature is 25°C.

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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What is the cell potential for the following electrochemical reaction at 25°C? Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)Given: E° (Zn²⁺/Zn) = -0.76 VE° (Cu²⁺/Cu) = +0.34 V

asked Mar 1 in ElectroChemistry by TheScientist (138k points)

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How can we accurately measure the concentration of heavy metals in soil samples and determine their potential toxicity to plants and animals in the environment?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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Sure, here's a problem for a chemistry student to solve:Calculate the acid dissociation constant (Ka) of a 0.1 M solution of acetic acid, given its pH is 3.7. The pKa value of acetic acid is 4.74.

asked Mar 1 in Chemical reactions by TheScientist (138k points)

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How can we accurately detect and quantify the levels of pesticide residues in various types of food samples and determine their potential health impacts on human consumers?

asked Mar 1 in Environmental Chemistry by TheScientist (138k points)

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What is the effect of pH on the zeta potential of colloidal particles and how can it be measured using electrophoresis technique?

asked Feb 28 in Surface Chemistry by TheScientist (138k points)

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What is the VSEPR geometry of the molecule CH4?

asked Feb 28 in Chemical bonding by TheScientist (138k points)

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How does the use of chlorofluorocarbons (CFCs) in refrigerants contribute to the depletion of the ozone layer and what alternative refrigerants can be used to mitigate this impact?

asked Feb 28 in Environmental Chemistry by TheScientist (138k points)

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What is the standard enthalpy change for the reaction N2(g) + 3H2(g) → 2NH3(g) given the following standard enthalpies of formation: ΔHf°(N2)=0 kJ/mol, ΔHf°(H2)=0 kJ/mol, ΔHf°(NH3)=-46.2 kJ/mol? Make sure to show your calculations and units.

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the equilibrium constant for the reaction: 2H2 (g) + O2 (g) ⇌ 2H2O (g)at 298 K, given that the partial pressures of H2 and O2 are 0.15 atm and 0.10 atm, respectively, at equilibrium?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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What is the bond enthalpy of the carbon-carbon bond in a molecule of ethane? Given that the enthalpy change for the reaction C2H6(g) → 2CH3(g) is +84.7 kJ/mol, calculate the bond enthalpy for the C-C bond in ethane.

asked Mar 1 in Chemical bonding by TheScientist (138k points)

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What is the Gibbs free energy change at 25°C for the reaction: 2NO(g) + O2(g) → 2NO2(g) given that the standard Gibbs free energy of formation of NO, O2, and NO2 are +90.4 kJ/mol, 0 kJ/mol and +51.3 kJ/mol, respectively?

asked Mar 1 in Chemical thermodynamics by TheScientist (138k points)

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1 answer 38 views

What chemical processes can be used to remove heavy metal ions (such as lead, cadmium, and mercury) from industrial wastewater, and how can these processes be optimized to achieve maximum removal efficiency?

asked Mar 1 in Chemical engineering by TheScientist (138k points)

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