Example: air traffic controller

Red Cabbage Indicator - NCSU

1. To prepare the red cabbage indicator, blend ¼ head of red cabbage in 300 mL of tap water. Strain the resulting mixture. This mixture can be used directly or stored for future use (for long term storage add 1% rubbing alcohol and refrigerating the solution). If used directly, this purple solution serves as the “pH 7” standard. 2.

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  Standards, Indicator

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