Chemistry Answers

conjugate acid of PO3−4

conjugate acid of NH3

Convert the following concentrations of aqueous solutions.

1.00m K₂SO_4(aq) %(w/w) FW (K₂SO₄)=174.26 g/mol

conjugate base of H2CO3

conjugate base of HSO-4

conjugate base of NH+4

What is the pH of an aqueous solution with a hydrogen ion concentration of [H+]=5.2×10−9 M?

For the reaction, H2O(l)⟶H2O(g), calculate ΔG at a) 20ºC, b) 100ºC and c) 150ºC.

Calculate the standard-free energy changes for the reaction 2MgO(s) + 2Mg(s) + O2(g) at 25ºC .

With solution

Determine the equivalent of one mole of the following substances, given type of reaction they participate in.

1. NaOH Acid-Base Reaction to form NaCl

2. HNO₃ Acid-Base reaction to form NaNO₃

3. H₂SO₄ Acid-Base reaction to form Na₂SO₄

4. Sr(OH)₂ Acid-Base reaction to form SrCl₂

5. H₃PO₄ Acid-Base reaction to form Na₃PO₄

6. CaCl₂ precipitation reaction to form CaCO₃

7. H₃PO₄ precipitation reaction to form Mg₃(PO₂)₂

8. AgNO₃ precipitation reaction to form Agl

9. Ba(C₂H₃O₂)₂ precipitation reaction to form BaSO₄

10. AlBr₃ precipitation reaction to form Al(OH)₃

11. FeCl₃ redox reaction to form FeCl₃

12. Br₂ redox reaction to form KBr

13. Zn redox reaction to form ZnSO₄

14. HCl redox reaction to form H₂

15. Cu redox reaction to form CuO

What is the concentration of the solutions of the following:

1. 1mol and 1kg

2. 1mol and 1L

3. 5mol and 100g

4. 4mol and 25mL

5. 20mol and 9L

6. 34mol and 1000kg

7. 9mmol and 100mL

8. 4.3 umol and 600g

9. 4mmol and 15mg

10. 11nmol and 20g

If 15.0 mol of C₃H₈ react with 4.5 mol of O₂ which is the limiting reagent? Which is the excess reagent?

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If the actual yield of CO₂ is 150g, what is the percent yield of CO₂?

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11.  Describe the formation of outer orbit complex [Ni(H₂O)₆]²⁺ ion using VBT