A study of materials on the endothermic reaction in lower secondary school science : The experimental condition using sodium hydrogen carbonate and citric acid

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  • 中学校理科における吸熱反応に関する教材研究 : 炭酸水素ナトリウムおよびクエン酸を用いた実験条件
  • チュウガッコウ リカ ニオケル キュウネツ ハンノウ ニ カンスル キョウザイ ケンキュウ : タンサン スイソ ナトリウム オヨビ クエンサン オ モチイタ ジッケン ジョウケン

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The endothermic reaction is studied in lower secondary school science. In the text book, however, the reagents that require caution such as ammonium chloride and barium hydroxide were used for this experiment. Thus, in the present study, to obtain the suitable conditions for the endothermic reaction using sodium hydrogen carbonate and citric acid instead of ammonium chloride and barium hydroxide, we examined the effects of amount and ratio of the reagents on the reaction.

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