question What is the primary function of a buffer solution in potentiometric titrations

Chemistry

What is the primary function of a buffer solution in potentiometric titrations?

A. Maintains a constant pH
B. Enhances the color of the solution
C. Accelerates the reaction rate
D. Increases the sensitivity of the electrode

A buffer solution in potentiometric titrations maintains a constant pH, preventing significant changes in acidity or alkalinity.

What is the term for the process by which mRNA is decoded to produce a specific sequence of amino acids during protein synthesis?

A. Translation
B. Transcription
C. Replication
D. Transformation

Which element has the highest electronegativity in the periodic table?

A. Fluorine
B. Oxygen
C. Nitrogen
D. Chlorine

What is the equation for the Gibbs free energy (G) in a reaction?

A. ΔG = ΔH - TΔS
B. ΔG = ΔH + TΔS
C. ΔG = ΔH/T
D. ΔG = -ΔH/T

Which of the following is a heavy metal often associated with batteries?

A. Lead
B. Lithium
C. Lanthanum
D. Lutetium

What is the equation for calculating work (w) in a gas expansion or compression?

A. w = -PΔV
B. w = PΔV
C. w = ΔH
D. w = ΔS

The equation ΔG = ΔH - TΔS is related to which thermodynamic process?

A. Gibbs free energy
B. Enthalpy
C. Entropy
D. Internal energy

What is the formula for calculating heat (q) in a reaction?

A. q = mcΔT
B. q = nCΔT
C. q = ΔH
D. q = ΔS

Which technique involves the study of the interaction between magnetic nuclei and an external magnetic field?

A. Nuclear magnetic resonance (NMR)
B. Gas chromatography (GC)
C. Mass spectrometry (MS)
D. X-ray diffraction

The VSEPR theory is used to predict:

A. Molecular shapes
B. Bond strengths
C. Electron affinities
D. Ionization energies

The relationship between the rate constant (k) and the temperature (T) in the Arrhenius equation is:

A. k ∝ e^(Ea/RT)
B. k ∝ e^(-Ea/RT)
C. k ∝ e^(RT/Ea)
D. k ∝ e^(-RT/Ea)