Answer to Question #317697 in General Chemistry for 62hxhsuwu

Question

To precipitate all the sulfate ions from 22.0 mL of 0.150 molarity aluminum sulfate as barium sulfate, how many mL of 0.250 molarity3. barium nitrate are required? (8 points)

____Ba(NO3)2(aq)+____Al2(SO4)3(aq)→______BaSO4(s)+____Al(NO3)3(aq)

To neutralize 15.8 mL of 0.687 molarity sodium hydroxide, how much 0.376 molarity HCl is needed? (5 points)

____HCl(aq)+____NaOH(aq)→____NaCl(aq)+____H(OH)(l)

Glucose is a natural sugar that occurs in abundance. What is the mass percent of a solution formed from 148 g of glucose and 698 g of water? (5 points)

What is the mass percent sucrose in a solution made by combining 365 g of a 8.90 percent sucrose by mass aqueous solution with 145 g of an 6.80 percent sucrose by mass aqueous solution? (5 points)

Answer 1

Moles of aluminium sulfate used=

(50/1000)× 0.350= 0.0175moles

Mole ratio= 3:1

Moles of barium nitrate=

0.0175× 3= 0.0525moles

(V/ 1000)× 0.250= 0.0525

V= 0.0525/0.00025 = 210ml