Question:1 You are given 4.8 g of a hypothetical compound AwB,CyDz in some water

Question

Question:1 You are given 4.8 g of a hypothetical compound AwB,CyDz in some water. Upon dissolving. the compound splits apart into A(a). B(aq). C(aq) and D(aq). B is a base that undergoes the following reaction with HC: In order to determine the number of moles of B in the compound you perform a titration. First you dissolve a 0.490 g sample of the compound in 26.6 mL of water. You then perform the titration and find that it takes 17.38 mL of 1.300 x 10-02 M HCl to reach the end-point of the titration. The molar mass of B is 596.81 g/mol. Based on this information, complete the following: Moles of HCI used:

Explanation / Answer

( The molar mass given should be of the Hypothetical compound ...i feel there is mistake in question , the Molar mass Hypothetical compound = 596.81 g/mol )

Atomic mass of B should be given

Given :

Moles of HCl used = .22594

Moles of B   = 1/2 (.22594) = .11297

Each mole of B needs two moles of HCl  

Let The Moles of hypotehtical Compound be = .49/596.81 mole = 8.21x10-4 moles

Then moles of B = (Moles of hypotehtical Compound) x   X

                            = .11297 ( as calculated above )

   ( 8.21x10-4 moles) X x = .11297

x = 14 atoms of B per molecule of the hypotehtical compound

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.