Which of the following
statements is true concerning
acids and bases?
A. acids and bases don't react with
each other
B. acids mixed with bases neutralize each other
C. acids mixed with bases make
stronger bases
D. acids mixed with bases make
stronger acids

A. Acids and bases don't react with each other.  --> False.  Acids and bases react in reactions called neutralization reactions, whose products are salt and water.

B. Acids mixed with bases neutralize each other.  --> True.  See above.

C. Acids mixed with bases make stronger bases.  --> False.  Acids and bases react to neutralize each other, so they would weaken each other, not result in a stronger base or a stronger acid.

D. Acids mixed with bases make stronger acids.  --> False.  See above.

B. Acids mixed with bases neutralize each other

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some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg