A student investigated the reaction between potassium iodide and lead nitrate.
....................... | + | ....................... | → | ....................... | + | ....................... |
....................... | ....................... | ....................... | ....................... |
Reactants | Products | |
total mass in g | 21.7 | 21.7 |
Figure 4
State how the results in Figure 4 show that mass is conserved in this reaction.
(1)
In another experiment, a student investigated the temperature decrease when different amounts of ammonium nitrate crystals were dissolved in 100 cm3 of water.
The apparatus used is shown in Figure 5.
Figure 5
The student used the following method.
activation energy products reactants |
(2)
Figure 6
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