Testing toothpaste for alkalinity. Litmus indicator changes its color depending on the pH. Here a litmus indicator paper strip has changed color from red to blue after coming in contact with toothpaste that contains sodium bicarbonate (NaHCO3). The test shows that the toothpaste is alkaline.
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Details
Creative#:
TOP22306527
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
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No
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