Examlex
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 × 10- 4.
Formal Operational
The stage in Jean Piaget's theory of cognitive development where individuals are able to think abstractly and reason logically.
Stranger Anxiety
A form of distress that children experience when exposed to strangers, typically emerging around 6 to 12 months of age.
Object Permanence
The concept that objects maintain their existence beyond our sensory perception, remaining present even when not directly observed.
Conservation
The understanding that certain properties of physical objects or substances remain the same even when their appearance changes.
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