What is the purpose of a reference electrode in potentiometric measurements?

According to the Second Law of Thermodynamics, the entropy of the universe tends to:

Which molecule has a linear shape due to the absence of lone pairs on the central atom?

The Boyle's Law describes the relationship between pressure and:

The concept of "enthalpy of combustion" is related to:

The bond angle in a molecule with a trigonal bipyramidal shape is approximately:

The triple point of water is defined at:

The technique that measures the rotation of plane-polarized light to quantify the concentration of optically active substances is called:

The chemical equation 2KBr + Cl₂ → 2KCl + Br₂ represents a:

Which analytical technique is suitable for analyzing the elemental composition of solid samples?