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marin [14]
3 years ago
13

If 0.8675 g of KHP requires 24.56 mL of an NaOH solution to reach the equivalence

Chemistry
1 answer:
ValentinkaMS [17]3 years ago
6 0

Answer:

M_{base}=0.173M

Explanation:

Hello there!

In this case, since the titration of acids like KHP with bases like NaOH are performed in a 1:1 mole ratio, it is possible for us to know that their moles are the same at the equivalence point, and the concentration, volume and moles are related as follows:

n_{acid}=M_{base}V_{base}

Thus, by solving for the volume of the base as NaOH, we obtain:

M_{base}=\frac{n_{acid}}{V_{base}} \\\\M_{base}=\frac{0.8675g*\frac{1mol}{204.22g} }{0.02456L} \\\\M_{base}=0.173M

Best regards!

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water displacement

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A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is it’s density?
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What is ΔG for the reaction at body temperature (37.0 °C) if the concentration of A is 1.6 M and the concentration of B is 0.50
Galina-37 [17]

Answer:

The Gibbs free energy is -2997.83 kJ mol-1.

Explanation:

The change in Gibbs free energy of the reaction \Delta G can be calculated using the formula.

\Delta G = -RTlnK

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T = the temperature of the reaction in Kelvin = (37.0 + 273) = 310K

K = Raio of molar concentration of the two reactants = 1.6/0.5 = 3.2

Therefore,

\Delta G = -8.314 \times 310 \times  ln (3.2) = -2997.83 kJ mol-1

Therefore the Gibbs free energy is -2997.83 kJ mol-1.

The negative sign indicates that the reaction is spontaneous.

4 0
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What is the sum of 334.540 g and 198.9916 g to the correct significant figure?
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A hair spray can has a volume of 565 mL. If the can is at 42 C and 5 atm, what volume would the hair spray occupy at STP?
Alex777 [14]

Answer:

V_2 = 2.447 atm

Explanation:

As we know that

PV = nRT\\

Where P is the pressure in atmospheric pressure

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V is the volume in liters

\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}

Substituting the given values in above equation, we get -

\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\\\frac{5*0.565}{315.15} = \frac{1*V_2}{273}

On rearranging, we get

\frac{5*0.565*273}{315.15} = V_2\\V_2 = 2.447

V_2 = 2.447 atm

5 0
3 years ago
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