low water and low ph
high water activity neutral ph
They all have a low pH, distilled water has a pH of around 7 and vinegar is an acid along with seawater making them below seven.
Enzymes shows different enzyme activity in different pH value.If the pH is high or low than the optimum pH there is a decrease in the activity of the enzyme.But if the pH is very high or very low it may lead to the deactivation of the enzyme.
The activity of the enzymes depends on the specific pH needed.
They affect the river by changing the temperature of the water, if the pH levels are high then the water is warmer and if the pH levels are low then the water is cold.
Generally the juice of vegetables is under 7.
Yes, gravy will go bad if not refrigerated. The pH and water activity are not low enough to make it shelf stable without a canning process.
Ammonia is a basic gas. It shows high ph if it is dissolved in water.
Maybe the water has some CO2 dissolved in it.
Low pH rain water is caused by pollutants in the air that create acids when they come in contact with water. Many of the pollutants are from burning fossil fuels such as coal.