Question

Определите массовые отношения в фосфорной кислоте Н3РО4(цифры маленькие с низу букв)

Answer 1

H3PO4      (1*3) : 31: (16*4) = 3:31:64

Answer 2

Mass Relations in Phosphoric Acid H3PO4

Phosphoric acid (H3PO4) is a tribasic acid, meaning it can donate three protons (hydrogen ions) in acid-base reactions. The mass relations in phosphoric acid can be determined based on its chemical composition.

Chemical Composition: Phosphoric acid (H3PO4) consists of one phosphorus atom (P), four oxygen atoms (O), and three hydrogen atoms (H). The molar mass of phosphoric acid can be calculated by adding the atomic masses of each element in the compound.

Molar Mass Calculation: - Phosphorus (P) atomic mass: 30.97 g/mol - Oxygen (O) atomic mass: 16.00 g/mol - Hydrogen (H) atomic mass: 1.01 g/mol

The molar mass of phosphoric acid (H3PO4) can be calculated as follows: ``` Molar mass = (1 * P) + (4 * O) + (3 * H) = (1 * 30.97) + (4 * 16.00) + (3 * 1.01) = 97.97 g/mol + 64.00 g/mol + 3.03 g/mol = 166.00 g/mol ``` Mass Relations: - Phosphorus (P) contributes approximately 18.63% to the molar mass of phosphoric acid. - Oxygen (O) contributes approximately 38.55% to the molar mass of phosphoric acid. - Hydrogen (H) contributes approximately 42.42% to the molar mass of phosphoric acid.

These mass relations are based on the molar mass of each element in the compound relative to the total molar mass of phosphoric acid.