Are the following substances acid, base, or neutral:
sodium bicarbonate (pH = 8.3):
Blood (pH = 7.4):
milk (pH =6.7):
orange juice (pH = 3.6):
milk of magnesia (pH = 10.5):
How do you come up with the answers?
http://www.elmhurst.edu/~chm/vchembook/184ph.html
THANK YOU!!!!!
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To determine whether a substance is an acid, base, or neutral, we can use the pH scale. The pH scale ranges from 0 to 14, with pH 7 being neutral. Substances with a pH less than 7 are considered acidic, while substances with a pH greater than 7 are considered basic (or alkaline).
Let's analyze each substance:
1. Sodium bicarbonate (pH = 8.3): With a pH of 8.3, sodium bicarbonate is basic. It falls on the alkaline side of the pH scale.
2. Blood (pH = 7.4): The pH of blood is approximately 7.4, which is close to neutral. Therefore, blood is considered neutral on the pH scale.
3. Milk (pH = 6.7): Milk has a pH of 6.7, which is lower than 7. This indicates that milk is slightly acidic, but it is still relatively close to neutral.
4. Orange juice (pH = 3.6): Orange juice has a pH of 3.6, which is significantly lower than 7. Thus, orange juice is considered acidic.
5. Milk of magnesia (pH = 10.5): With a pH of 10.5, milk of magnesia is basic. It is similar to sodium bicarbonate and falls on the alkaline side of the pH scale.
In summary, sodium bicarbonate and milk of magnesia are bases (alkaline), blood is neutral, and milk and orange juice are slightly acidic.