Question

lab 10

question 1. the balanced equation for the reaction between Al and HCl is?

question 2. in the reaction between Al and HCl if 1.32 g of Al were reacted with excess hydrochloric acid how many mL of hydrogen gas would be emitted?

question 3. what volume of gas (in mL) at STP would have 32.5 mL at 745.2 mm Hgand 23.5 degrees C?

question 4. what is the balanced reaction for the experiment being done in this lab?

Answer 1

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1. Ans: The reaction betweew all and Hal is Al + HQ All th e As the no. of atoms on both sides is not equal, it is balanced. The balanced equation Al + 6 Hll 2 AC + 34. 2. Ans - from the balanced equation, 2 moles of Al gives 3 moles of the man of Al given = 1.329, a atomic man of Al = 26.98 g/mol . no. of moles of Al = 1,32 mo 26.98 2 = 0.049 modes . 0.049 moles of Al will give 3x0.049 moes of = 0.029 moles of Considering at STP, We have, PV = nRT U=nRT JO = 0.074 x 0.0821 x 298 = 1,81 L = 1810 mL. So volume of the gas emitted is 1810 mL