Question

Part II. Combustion 2. Pour by holding a burning splint over the heptane Use a test tube holder to invert a test tube over the flame produced by the bep- until it from the heptane flame. Quickly move the inverted test tube away from the flame and insert the burning splint into the inverted test tube. What happened to the burning splint? Carefully note ontop of itaud for couneseconds Hen test tube turtend e block colo up over tents. What gas do you think was collected? Why? ical Reactions Data Sheet: Chemical Reactions Part I. Combination 1. Obtain a 1-inch piece of magnesium ribbon. Hold the piece of Mg ribbon with your crucible tongs and ignite it with your Bunsen burner. Caution! Do not look directly at the burning rib- bon TABLE 9.6 Observations combustion of magnesium ribbon The mogaestum looks Silverond Solid-Afer Placed H ribhon on-te flanf Coapies se coads treated dity whte cofe and reen cosc- Is the reaction exothermic or endothermic a. Products Reactants Balanced Chemical Equation Part II. Combustion Pour approximately 1 mL of heptane, C,Hios into an evaporating dish. (Measure the heptane in linder) Carefully ienite the heptane by holding a burning splint over the heptane 2.

Answer 1

Observation hen we insert the buning splnt" burning splininstantly extinguish o q Soeby black gas collected midsay into the inverted test tubethen" a Atter the smoke has deared, 'i see' up the in verted test tube -b, 1 Black sooty gass observed, when heldte test tube over the burnin heptane But when we insert the burninq pling into the inverted test bube the the burning splint ins tantly exlinguish off It sho an incombusble as is dioxide (C0 Reactants Balanced chemical euben Hance, the gas collecteal is carbon Produut Sunday 07

Ohservatien-On combusien of magnesium ribbon, ribbon burns whil emitbinq 141-The-react, on is exothermic . bright light and large amount어 hear Sunday 14 eactants Balances chemica eqalion 7