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What is the pH of a 0.01 M solution of hydrochloric acid at 25°C, as determined using a pH meter with a precision of ± 0.02 pH units?

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

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What is the heat of neutralization for the reaction between 50 mL of 1.0 M hydrochloric acid (HCl) and 50 mL of 1.0 M sodium hydroxide (NaOH) at a room temperature of 25°C? The enthalpy of neutralization of HCl and NaOH is -57.1 kJ/mol.

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

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What is the theoretical yield of aspirin that can be obtained from the reaction of 2.0 grams of salicylic acid and 5.0 mL of acetic anhydride? Provide your answer in grams and show your calculations.

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

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What is the formal charge of sulfur in the sulfate ion (SO4)^(2-) ? Show your calculations.

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

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What is the efficiency of an electrochemical cell with a voltage of 0.8V and a current of 2 mA when Cu and Ag electrodes are used in a CuSO4 and AgNO3 electrolyte solution, with an electrode area of 10cm² and a duration of 3 hours?

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

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What is the dipole moment of the polar molecule CHCl3?

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

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What is the expected pH of a 0.1 M solution of acetic acid (CH3COOH) with a pKa value of 4.76? Provide a detailed explanation of your answer, including any necessary calculations or formulas.

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

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What is the standard enthalpy change for the reaction between 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH at 25°C, given that the balanced equation is HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) and the specific heat capacity of the solution is 4.18 J/g K?

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

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What are the regulatory mechanisms that control the utilization of glucose in the human body during periods of rest and exercise?

asked Feb 28 in BioChemistry by TheScientist (138k points)

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What is the standard enthalpy change for the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) in aqueous solutions when 25 mL of 2.0M HCl is mixed with 50 mL of 1.0M NaOH at 25⁰C and atmospheric pressure?

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

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What is the surface area of a given sample of activated carbon powder, if it has adsorbed 12mL of nitrogen gas at 77 K and a pressure of 1 atm, and assuming the cross-sectional area of a nitrogen molecule to be 0.16 nm²?

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

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What is the equilibrium constant expression for the following reaction? 2 NO(g) + O2(g) ⇌ 2 NO2(g) Given that the initial concentrations of NO, O2, and NO2 were 0.025 M, 0.015 M, and 0 M, respectively, calculate the equilibrium constant (Kc) at 25°C.

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

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What is the standard enthalpy change for the reaction between 1 mol of ethanoic acid and 1 mol of sodium hydroxide in aqueous solution, given that the reaction produces 1 mol of sodium ethanoate and 1 mol of water?

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

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What is the standard enthalpy change for the fusion reaction of 10.0 grams of solid water (H2O) at 0°C into liquid water at 0°C, given the standard enthalpy of fusion for water is 6.01 kJ/mol?

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

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How does the change in solvent polarity affect the reaction rate in the photochemical reaction of (insert specific compound here)?

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

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What processing techniques can be used to manufacture polymer packaging products with enhanced mechanical properties and barrier properties against water vapor, oxygen, and other gases?

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

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How can we design a cost-effective and efficient system for the production of a specific cosmetic while taking into consideration the safety of the product and its impact on the environment?

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

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What is the standard enthalpy change of solution of 3.5 g of sodium hydroxide (NaOH) in 50 mL of water at a constant temperature of 25 °C?

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

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How do you design a chemical reactor to produce 10 kg/hr of product X with a yield of at least 90%, given a feed of 100 kg/hr of reactants A and B, and assuming a first-order reaction?

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

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How long would it take for a molecule of oxygen to diffuse through a membrane that is 2 mm thick at a given temperature and pressure? What factors affect the rate of diffusion for this particular gas?

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

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