Answer:
0.12 M
Explanation:
Molarity of sodium hydroxide = number of moles of sodium hydroxide / volume in liters
equation of reaction between NaOH and Potassium hydrogen phthalate
NaOH(aq) + KHC₈H₄O₄(aq) KNaC₈H₄O₄(aq) + H₂O(aq)
molar mass of KHC₈H₄O₄ = 204.22g/mol
amount required to titrate with NaOH = 0.5816 g
mole of KHC₈H₄O₄ = 0.5816 g / 204.22g/mol = 0.00285 mole
considering the equation, 1 mole of NaOH required 1 mole of KHC₈H₄O₄
0.00285 mole KHC₈H₄O₄ will require 0.00285 mole of NaOH
Molarity = 0.00285 mole / ( 23.73 ml / 1000ml) L = 0.12 M
<h3>
Answer:</h3>
0.002 moles
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Explanation:</h3>
Concept tested: Molarity
We are given;
- Volume of HCl as 20 ml or 0.02 L
- Molarity of HCl solution as 0.10 M
We are required to calculate the number of moles of HCl
What is molarity?
- Molarity is the concentration of a solution in moles per liter
How is it calculated?
- It calculated by dividing number of moles by volume;
- Molarity = Number of moles ÷ Volume
To calculate the number of moles we rearrange the formula;
Moles = Molarity × Volume
In this case;
Moles of HCl = 0.10 M × 0.02 L
= 0.002 moles
Therefore, the number of moles of HCl is 0.002 moles
Answer:
degree of hotness or coldness measured on a definite scale. the degree of heat that is natural to the body of a living being. abnormally high body heat running a temperature.
Explanation:
Answer:
126000J
Explanation:
From the question given, we obtained the following information:
M = 1500g
C = 4.2J/g°C
ΔT = 20°C
Q =?
Q= MCΔT
Q = 1500 x 4.2 x 20 =
Q = 126000J
Ba²⁺ + 2Cl⁻ + 2H⁺ + SO₄²⁻ = BaSO₄ (precipitate) + 2H⁺ + 2Cl⁻
Ba²⁺ + SO₄²⁻ = BaSO₄
