1. Determine the number of moles of copper(Il) nitrate in 25.06 mL of a 2.44 M C

Question

1. Determine the number of moles of copper(Il) nitrate in 25.06 mL of a 2.44 M Cu(NO3)2 aqueous solution. A) 0.882 moles B) 0.0595 moles C) 7.52 moles Do.0611 moles 0.02000-M KMnO4 aqueous solution? A) 0.1580 g many grams of potassium permanganate, KMn04, are present in 75.22 mL of a B) 0.8248g C) 0.2377 g D) 1.504 g 3. Which of the following is a non-electrolyte? A) NaCli B) MgSO4 C) AIBrs D) CsH120s 4. What is the concentration of the chloride ion in a 0.220-M aqueous aluminum chloride solution? Aluminum chloride is a strong electrolyte A) 0.220 M B) 0.660 M C) 0.440 M D1.32 M 5. The reaction of strontium oxide and nitric acid proceeds according to the following chemical equation. SrO (s) + 2 HNOs (aq) Sr(NO3)2 (aq) + H2O () Determine the mass of strontium oxide required to completely react with 1.034 moles of nitric acid. A) 29.26 9 B) 53.57 g C) 113.1g D) 51.81 g 6. Determine the volume of 7.19 M HNOs (aq) required to react with 2.38 kg of solid AI(OH)s. A) 18.6 L B)3.27 L (C)1.1 D) 12.7 L 3 L ple of an acid was dissolved in enough water to create 100.0 mL of 7. A 1.00-gram sample of an acid was dissolved in enough water to create 100.0 aqueous solution. This solution was titrated by 15.00 mL of 1.058 M NaOH (aq). Determine the formula mass of the acid, assuming one acidic proton per formula unit. A) 60.0 g/mol B) 24.3 g/mol C) 63.0 g/mol D) 122 g/mol

Explanation / Answer

Ans 1: you are right that 0.0611 moles of copper nitrate is present in 2.44M of 25.6 ml solution.

Ans2: molecular weight of potassium permagnate is158.034. if you do the same calculation like for above qns. you will get 0.237 gm as a solution. (C) is the correct answer.

M=W/M X1000/V

Ans 3: C6H12O6 is non electrolyte because electrolytes are those compounds which dissociate in water and forms cation and abion. Here glucose doesnot dissociate in cation and anion.

Ans 4: Ammonium chloride (NH4Cl) is a strong electrolyte it dissociate in water as a NH4+ and Cl- ions. So the concentration of NH4+ which is ammonium is equal to conc. of chloride ion. So the answer is 0.22M.

Ans 5: SrO + 2HNO3--> Sr(NO3)2 +H2O

1.034 moles of nitric acid is reqired for complete reaction.So here 2HNO3=1.034. so 1.034/2=0.517 moles is required for SrO.

The molecular weight of SrO =103.6

If you multiply 103.6 X0.517 = 53.57.

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