Blood – 47% of students classified this as neutral.
Distilled water – 21% classified this as basic.
Oven cleaner – 18% classified this as acidic.
Rain water – 47% classified this as neutral, and 21% stated it was basic.
Salt water – 25% classified this as basic.
Shampoo – 26% classified this as neutral.
Tea – 23% classified this as basic, and 20% stated it was neutral.