5 MSQ Questions

Question 1:
100 L of 5 mol/L NaOH are required to fully titrate a

Question

5 MSQ Questions

Question 1: 100 L of 5 mol/L NaOH are required to fully titrate a

50 L solution of HCl. What is the initial concentration of the acid?

  1. 10 mol/L
  2. 250 mol/L
  3. 500 mol/L
  4. 20 mol/L

Question 2: A 0.05 L solution of 0.5 mol/L NaOH was titrated until neutralized into a 0.025 L sample of HCl. What was the concentration of the HCl?

  1. 0.025 mol/L
  2. 1 mol/L
  3. 20 mol/L
  4. 10 mol/L

Question 3: If you know that after heating the hydrate, the amount of the lost water is 0.6442 moles. Calculate the amount (n) of barium chloride

  1. 0.03578 mol
  2. 0.3221 mol
  3. 1.2884 mol
  4. 0.00309 mol

Question 4: Based on the molar ration of BaCl2 : H2O, how many moles of water molecules would be attached to 12 moles of hydrated barium chloride?

  1. 24
  2. 6
  3. 12
  4. 2

Question 5: You start your experiment with an empty crucible having a mass of 10.3362g. After adding your hydrated compound, the mass of the crucible and hydrate is 14.5003g. After heating the compound, you weigh the crucible again and the mass is 12.9882g. What is the mass of the water in the hydrated compound? And what is the mass of the anhydrous sa?

A. mass of the water is 4.1641g and mass of the anhydrate is 2.652g
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