Which solution has the greatest number of hydroxide ions?
2 answers:
Option A: baking soda, pH=9
The number of hydroxide ions or concentration of hydroxide ions depends on pOH of solution as follows:
This means more the value of pOH, smaller will be the number of hydroxide ions.
Thus, solution with smaller value of pOH, will have greatest number of hydroxide ions.
Also, pH and pOH are related to each other as follows:
Calculating pOH from all the given pH values,
pOH of baking soda:
pOH=14-9=5
pOH of milk:
pOH=14-6=8
pOH of tomato juice:
pOH=14-3.5=10.5
pOH of vinegar:
pOH=14-2=12
here, baking soda has smallest pOH value, thus, it will have greatest number of hydroxide ions.
Also, more the basic is solution, more it will have hydroxide ions, or more is the value of pH more the solution is basic. The pH of baking soda is maximum that is 9 thus, it is most basic among given options and contain greater number of hydroxide ions.
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When sodium phosphate reacts with sulfuric acid, forming sodium sulfate and phosphoric acid, the stoichiometric coefficient for sulfuric acid in the balanced chemical equation is 3.
In every balanced chemical equation, the total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side. The stoichiometric coefficient is the number written in front of each reactants and products that tells how many moles of each are needed in the reaction.
The chemical equation for the given reaction is:
+
=
+
Put the necessary stoichiometric coefficient to balance each element.
Balancing Na:
+
=
+
Balancing P:
+
=
+
Balancing S:
+
=
+
Notice that H and O are already balanced.
Hence, the balanced chemical equation for the reaction is:
+
=
+
where 3 is the stoichiometric coefficient of sulfuric acid, .
Learn more about stoichiometric coefficient here: brainly.com/question/6666875
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