Abstract “Igniting into a snake” is an interesting experiment in chemistry and elementary school science experiments. An orthogonal experiment was designed to investigate the effects of sucrose mass, sodium bicarbonate mass, and the shape of the stack on the results of the experiment. The results showed that the stacking shape of the reaction mixture was the most important factor affecting the “snake”, and the stacking shape of the cylinder could significantly increase the length of the “snake”, which was conducive to the improvement of the integrity of the “snake”. The optimum experimental conditions were 4 g of sucrose, 0.4 g of sodium bicarbonate, and the optimum stacking shape of the reaction mixture was cylinder, and the average length of the “snake” was 67 cm. The relative standard deviation (RSD) of the reproducibility test was 6.0%, which basically met the requirements of reproducibility.
YAN Xiang, HU Hai-Xia, LIN Cheng-Xia, XIN Ping-Juan, WANG Du-Liu, YANG Jian-Dong, ZHANG Shao-Fei. Optimization of Experimental Conditions of “Igniting into a Snake”[J]. Chinese Journal of Chemical Education, 2024, 45(23): 89-93.
