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According to Erikson, the psychological conflict of middle childhood is
Buffer Solution
A solution that can resist changes in pH when small quantities of an acid or base are added, maintaining a relatively constant pH.
pH
A measurement system that identifies whether an aqueous solution is acidic or alkaline, with values extending from 0 (indicative of acidity) to 14 (signifying basicity).
Components
Individual parts or substances that constitute a composite material or mixture.
pH
A measure of the hydrogen ion concentration in a solution, indicating its acidity or alkalinity on a scale of 0 to 14.
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