In both directions on the scale, between the whole number value, there is a difference of times the concentration of hydrogen ions and hydroxide ions. a ph of 5 is 100 times more acidic than a ph of 7.

10

Explanation:

pH is described with a logarithmic scale, so you need to know that this scale grows exponentially, and for each whole number that you move on between all parts in the scale you will grow or decrease by a factor of 10. So the answer is 10  times the concentration of hydrogen ions and hydroxide ions.

h let me think

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.