How does ph vary between tap bottled distilled and outdoor water?

Testing indicates that water can be acidic or basic and this can be measure through the potential of hydrogen or pH of water. Solutions is said to be acidic if the pH is less than 7 and solutions with a pH greater than 7 are basic. Moreover, tap water had an approximate pH of 7.5, the distilled water had pH 5.7 while outdoor water derived from mineral water had pH between 7.5 and 8. This numeric scale can be affected by temperature, as temperature increases, pH decreases. This occurrence just explains that the point at which pH is neutral drops. Here, the hydrogen ions and the hydroxyl ions in the water are still balanced.

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

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