A 250 ML Sample of 0

question 95

Multiple Choice

A 25.0 mL sample of 0.150 mol L^-1 hydrofluoric acid is titrated with a 0.150 mol L^-1 NaOH solution. What is the pH before any base is added? Hydrofluoric acid is monoprotic. The of hydrofluoric acid is 3.5 × 10^-4.

• A) 2.33 × 10^-3
• B) 2.63
• C) 3.46
• D) 7.07 × 10^-3
• E) 2.15

---

Definitions:

Maria Montessori

An Italian physician and educator best known for developing the educational approach that bears her name, emphasizing independence, freedom within limits, and respect for a child’s natural psychological, physical, and social development.

Reggio Emilia

An educational philosophy and pedagogy focused on preschool and primary education, emphasizing child-centered, inquiry-based learning within a supportive community.

Piagetian Clinical

Pertains to the clinical method used by Jean Piaget in developmental psychology to study children's thought processes.

Hormonal Imbalances

A state where there is too much or too little of one or more hormones in the bloodstream.