Chloroplasts
A pH scale up to 7 indicates acidity, with lower values being more acidic. pH 7 is neutral. A pH scale up to 8 would still be slightly acidic, with substances becoming more neutral as the value approaches 7.
the pH
The test strip would turn shades of green, since the pH is usually between 6 and 8.
A pH of 0 is most acidic, while a pH of 14 is most basic. A pH of 7 is neutral.
Ph of toothpaste depends upon brand but most likely it is between 7 and 9 .
A pH of 0 is the most acidic on the pH scale.
most likely water
The pH of an acidic compound is most likely to be below 7, typically ranging from 0 to 6. Acids release hydrogen ions (H+) when they dissolve in water, lowering the pH of the solution. The lower the pH value, the higher the acidity of the compound.
Acid rain most likely.
The most likely number to be rolled in craps is the number 7
most bottles will not have the pH of the liquid inside, so you will need a pH test strip to know the pH of the liquid inside the bottle.
Chloroplasts
A solution of sodium hydroxide in water will have a pH greater than 7, typically ranging from 12 to 14. Sodium hydroxide is a strong base that dissociates completely in water to produce hydroxide ions, leading to a high pH.
A pH scale up to 7 indicates acidity, with lower values being more acidic. pH 7 is neutral. A pH scale up to 8 would still be slightly acidic, with substances becoming more neutral as the value approaches 7.
Lower numbers are more acidic. The normal range for pH is 0-14. However, it's possible to go beyond that range (2M HCl has a negative pH); I'm not certain what the absolute lowest (or highest) possible value is.
Water is most likely to not be acidic, as it has a neutral pH of 7. The other options, lemon juice, vinegar, and tomato juice, are all acidic substances.