Question

1. Розрахувати число еквівалентності та молярну масу еквівалентiв для H2SO4, NaOH, Na2CO3, H3PO4, Na2SO4, H3B03, Ca3(PO4)2, H23, Al2(SO4)3 в реакціях, якi йдуть до кінця. ​

Answer 1

Calculation of Equivalent Weight and Molar Mass of Compounds

To calculate the equivalent weight and molar mass of compounds, we need to consider their chemical formulas and atomic masses. Here are the calculations for the given compounds:

1. H2SO4 (Sulfuric Acid): - Chemical Formula: H2SO4 - Atomic Masses: H = 1.00784 g/mol, S = 32.06 g/mol, O = 15.999 g/mol - Equivalent Weight: The equivalent weight is the molar mass divided by the number of equivalents of the compound involved in a reaction. In the case of H2SO4, it can donate 2 equivalents of H+ ions. - Molar Mass: The molar mass is the sum of the atomic masses in the chemical formula. - Calculation: - Equivalent Weight = Molar Mass / Number of Equivalents - Molar Mass = (2 * H) + S + (4 * O) - Equivalent Weight of H2SO4: [[1]] - Molar Mass of H2SO4: [[2]]

2. NaOH (Sodium Hydroxide): - Chemical Formula: NaOH - Atomic Masses: Na = 22.98977 g/mol, O = 15.999 g/mol, H = 1.00784 g/mol - Equivalent Weight: NaOH can donate 1 equivalent of OH- ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of NaOH: [[3]] - Molar Mass of NaOH: [[4]]

3. Na2CO3 (Sodium Carbonate): - Chemical Formula: Na2CO3 - Atomic Masses: Na = 22.98977 g/mol, C = 12.011 g/mol, O = 15.999 g/mol - Equivalent Weight: Na2CO3 can donate 2 equivalents of Na+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of Na2CO3: [[5]] - Molar Mass of Na2CO3: [[6]]

4. H3PO4 (Phosphoric Acid): - Chemical Formula: H3PO4 - Atomic Masses: H = 1.00784 g/mol, P = 30.97376 g/mol, O = 15.999 g/mol - Equivalent Weight: H3PO4 can donate 3 equivalents of H+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of H3PO4: [[7]] - Molar Mass of H3PO4: [[8]]

5. Na2SO4 (Sodium Sulfate): - Chemical Formula: Na2SO4 - Atomic Masses: Na = 22.98977 g/mol, S = 32.06 g/mol, O = 15.999 g/mol - Equivalent Weight: Na2SO4 can donate 2 equivalents of Na+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of Na2SO4: [[9]] - Molar Mass of Na2SO4: [[10]]

6. H3BO3 (Boric Acid): - Chemical Formula: H3BO3 - Atomic Masses: H = 1.00784 g/mol, B = 10.81 g/mol, O = 15.999 g/mol - Equivalent Weight: H3BO3 can donate 3 equivalents of H+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of H3BO3: [[11]] - Molar Mass of H3BO3: [[12]]

7. Ca3(PO4)2 (Calcium Phosphate): - Chemical Formula: Ca3(PO4)2 - Atomic Masses: Ca = 40.08 g/mol, P = 30.97376 g/mol, O = 15.999 g/mol - Equivalent Weight: Ca3(PO4)2 can donate 2 equivalents of Ca2+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of Ca3(PO4)2: [[13]] - Molar Mass of Ca3(PO4)2: [[14]]

8. H2S3 (Hydrosulfuric Acid): - Chemical Formula: H2S3 - Atomic Masses: H = 1.00784 g/mol, S = 32.06 g/mol - Equivalent Weight: H2S3 can donate 2 equivalents of H+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of H2S3: [[15]] - Molar Mass of H2S3: [[16]]

9. Al2(SO4)3 (Aluminum Sulfate): - Chemical Formula: Al2(SO4)3 - Atomic Masses: Al = 26.98154 g/mol, S = 32.06 g/mol, O = 15.999 g/mol - Equivalent Weight: Al2(SO4)3 can donate 3 equivalents of Al3+ ions. - Molar Mass: Calculation similar to H2SO4. - Equivalent Weight of Al2(SO4)3: [[17]] - Molar Mass of Al2(SO4)3: [[18]]

Please note that the equivalent weight and molar mass values provided above are based on the atomic masses and stoichiometry of the compounds.