To calculate the neutralizing value of 3 parts by weight of anhydrous potassium carbonate (K2CO3), the formula used is based on its molecular weight and the equivalent weight of the compound. The molecular weight of K2CO3 is approximately 138.21 g/mol, and its neutralizing value is determined by the number of moles of K2CO3 that can neutralize an acid. For practical calculations, the neutralizing value can be expressed in terms of milliequivalents per gram. Users are encouraged to provide specific examples or scenarios to clarify the calculation process. Understanding these fundamentals is essential for accurate results in neutralization calculations.