Answer:
5.28 L
Explanation:
Step 1:
Data obtained from the question.
Volume of acid (Va) = 5.12L
Molarity of acid (Ma) = 2.75M
Molarity of base (Mb) = 4M
Volume of base (Vb) =.?
Step 2:
The balanced equation for the reaction
2H3PO4 + 3Mg(OH)2 → Mg3(PO4)2 + 6H2O
From the balanced equation above,
Mole ratio of the acid (nA) = 2
Mole ratio of the base (nB) = 3
Step 3:
Determination of the volume of the base.
This is illustrated below:
MaVa/MbVb = nA/nB
2.75 x 5.12 / 4 x Vb = 2/3
Cross multiply
4 x 2 x Vb = 2.75 x 5.12 x 3
Divide both side by 4 x 2
Vb = (2.75 x 5.12 x 3)/(4 x 2)
Vb = 5.28 L
Therefore, the volume of the base is 5.28 L
Answer:
Explanation:
<u>1) Rate law, at a given temperature:</u>
- Since all the data are obtained at the same temperature, the equilibrium constant is the same.
- Since only reactants A and B participate in the reaction, you assume that the form of the rate law is:
r = K [A]ᵃ [B]ᵇ
<u>2) Use the data from the table</u>
- Since the first and second set of data have the same concentration of the reactant A, you can use them to find the exponent b:
r₁ = (1.50)ᵃ (1.50)ᵇ = 2.50 × 10⁻¹ M/s
r₂ = (1.50)ᵃ (2.50)ᵇ = 2.50 × 10⁻¹ M/s
Divide r₂ by r₁: [ 2.50 / 1.50] ᵇ = 1 ⇒ b = 0
- Use the first and second set of data to find the exponent a:
r₁ = (1.50)ᵃ (1.50)ᵇ = 2.50 × 10⁻¹ M/s
r₃ = (3.00)ᵃ (1.50)ᵇ = 5.00 × 10⁻¹ M/s
Divide r₃ by r₂: [3.00 / 1.50]ᵃ = [5.00 / 2.50]
2ᵃ = 2 ⇒ a = 1
<u>3) Write the rate law</u>
This means, that the rate is independent of reactant B and is of first order respect reactant A.
<u>4) Use any set of data to find K</u>
With the first set of data
- r = K (1.50 M) = 2.50 × 10⁻¹ M/s ⇒ K = 0.250 M/s / 1.50 M = 0.167 s⁻¹
Result: the rate constant is K = 0.167 s⁻¹
I believe the correct answer is 2340g of a particular substance will be dissolved in 650 L of H2O. Hope I was helpful in some way. Thanks. Peace.
Answer:
Calcium chloride (CaCl2) would help me eat my ice cream faster
Explanation:
Addition of salt to ice melts the lowers the freezing temperature of the ice thus melting the ice easily
Adding calcium chloride to my ice cream would help me eat it faster because the melting point of calcium chloride (772°C) is lower than that of sodium chloride (melting point is 801°C). Calcium chloride would melt my ice cream faster because of its lower melting point
