Asubstance with a high poh would likely have which of the following? a. a low [h+ ] and a high ph. b. a low [oh– ] and a high ph. c. a high [oh– ] and a low ph. d. a high [h+ ] and a low ph

The correct answer is option(D).

Explanation:

The pOH of the solution is defined as the negative logarithm of the concentration of hydroxide ions in a solution.

From the above relation we can say that:

So, substance with high pOH value will have low hydroxide concentration and lower value of pH.

And lower the pH higher will be the hydrogen ion concentration.

Hence, the correct answer is option(D).

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

c (diamond),

sio2 (quartz)