Patrick asked in 科學及數學化學 · 1 decade ago

PH 試劑問題

我看過有人用一瓶粉紅色液體, (主持人說含阿摩尼亞, 而且會揮發.) 噴到一塊帶酸性的白布上, 結果白布上開始時是有一團粉紅色印, 但不到半秒就變成透明, 消失得無影無蹤.

我想請問這瓶粉紅色液體 到底會是什麼東西 ?含什麼成份才能達到這種效果?

謝謝!

1 Answer

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  • 1 decade ago
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    Indicator solution : Phenolphthalein

    pink in alkali solution, the pink colour will turn to colourless when the ammonia is neutralized or evaporated

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