A buffer is prepared by mixing hypochlorous acid ( HClO ) and sodium hypochlorite ( NaClO ) . If a strong base, such as NaOH , i
1 answer:
<u>Answer:</u> The balanced chemical equation is written below.
<u>Explanation:</u>
We are given:
A weak acid that is hypochlorous acid (HClO) and basic salt that is sodium hypochlorite (NaClO)
When a strong base is added to the buffer, the hydroxide ion will be neutralized by hydrogen ions from the acid.
So, the buffer component that neutralizes the additional hydroxide ions in the solution is HClO
The chemical equation for the neutralization of hydroxide ion with acid follows:
Hence, the balanced chemical equation is written below.
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Answer:
ΔU=-369.2 kJ/mol.
Explanation:
We start from the equation:
Δ(H)=ΔU+Δ(PV), which is an extension of the well known relation: H=U+PV.
If Δ(PV) were calculated by ideal gas law,
PV=nRT
Δ(PV)=RTΔn.
Where Δn is the change of moles due to the reaction; but, this reaction does not give a moles change (Four moles of HCl produced from 4 moles of reactants), so Δ(PV)=0.
So, for this case, ΔH=ΔU.
The enthalpy of reaction given is for one mole of reactant, so the enthalpy of reaction for the reaction of interest must be multiplied by two:
ΔU=-369.2 kJ/mol.
Answer: 178.9 g
Explanation:
Density =
find volume of the cube: (5.80 cm) (5.80 cm) (5.80cm) = 195.112 cm³
1.0 cm³ = 1.0 mL
so 195.112 cm³ = 195.112 mL
plug value into density equation:
0.917 g/mL = (mass) / (195.112 mL)
and solve for mass!