Please answer all 6-7 questions and show work. Do not write answer in cursive. G

Question

Please answer all 6-7 questions and show work. Do not write answer in cursive.

Graded Sheet: how whether following reactiond to it the reactant or the product side to complete each of the For exannple 3112(g) + N2(g) 2NIh(g) + heat the product side er a reaction is exothermic or endothermic, heat is added to the reactant side or (write "4 heat" on one side of the reaction): HCM,O(a) 3 NaHco,() (2) Mg(s) + 2 HCl(aq)- H2(g) + MgCl2(aq) This problem to be done after Gas Laws Chapter. ou are asked to produce exactly 40.0 ml, of H2 gas from the reaction of magnesium and ng the balanced chemical reaction above, (2), determine how much magnesium nd how much HCI (in ml, assuming you have a 1.0 M solution) you need to add to produce exactly 40.0 ml. of H2 gas

Explanation / Answer

Balanced equation:
H3C6H5O7(aq) + 3 NaHCO3(s) + Heat ======> 3 CO2(g) + 3 H2O(l) + Na3C6H5O7(aq)

Baking soda and citric acid reaction will take temperature since it is an endothermic reaction.

Balanced equation:
Mg(s) + 2 HCl(aq) ===> H2(g) + MgCl2(aq) + Heat
Reaction type: single replacement

Mg and HCl is an exothermic reaction that releases heat.

Question 7

Reaction condition as STP

At STP. T = 273 K P = 1 atm

Let calculate the Moles of H2 of 40 ml

PV = nRT

R = 0.0821 L atm K-1 Mol-1

n = PV/RT = 1 x 0.04 / 0.0821 x 273 = 0.0017846 Moles

Moles of H2 = 0.0017846 Moles

Moles of Magnesium reacted =  0.0017846 Moles

Mass of Magnesium =  0.0017846 x 24.305 = 0.04337 gm

Moles of HCl added = 0.003569 Moles

Volume of HCl = 0.003569 x 1000 / 1 = 3.569 ml

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