Answer:
chemical equation
Explanation:
B.there is meat next to the cheese in the refrigerator
C.a boy waits five minutes to talk to his father
D.the mother takes her medication everyday at seven
B.) exposure to seasonal changes
C.) exposure to human activity
D.) exposure to moonlight
B) it is a product in one intermediate reaction and a catalyst in the other reaction.
C) it is a reactant in one intermediate reaction and a product in the other reaction.
D) it is a reactant in both of the intermediate reactions.
Answer: Option (C) is the correct option.
Explanation:
When two intermediate chemical equations are combined, the same substance that appears in the same phase can be canceled out, provided that it is a reactant in one intermediate reaction and a product in the other reaction.
For example,
....(1)
.........(2)
Cancelling the common species in both the equations as follows.
Therefore, on addition we get the equation as follows.
The solid powder contained hydrogen ions.
The pH indicator was used incorrectly.
The powder increased the hydrogen ion concentration of the solution.
Answer:
The powder increased the hydrogen ion concentration in the water
Explanation:
The ion that is responsible for acidity is the hydrogen ion. This is why all acids have the hydrogen ion in them. Examples are HCl, HBr, HNO3, H2SO4. So a solution with a higher concentrations of hydrogen ions in solution will be more acidic than one with less hydrogen ions in solution, So clearly in this case, the reason this powder would change the pH of water from 7 to 2.7 would be because there has been an increase in acidity of the solution or an increase in the concentration of hydrogen ions