The chemical formula for carbon and chlorine is CCl4 (carbon tetrachloride).
Answer : The concentration of NaOH is, 0.336 M
Explanation:
To calculate the concentration of base, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is
are the n-factor, molarity and volume of base which is NaOH.
We are given:
Putting values in above equation, we get:
Thus, the concentration of NaOH is, 0.336 M
First and fifth reaction shows endothermic reaction while the rest of it shows exothermic reaction.
<h3>What reaction shows exothermic and endothermic reaction?</h3>
The reaction between ammonium nitrate and water is an example of endothermic reaction because it absorbs heat from the surrounding environment.
Three drops of concentrated sulfuric acid added to 100 milliliters of water in a beaker makes the beaker hot because exothermic reaction occur.
Ammonium chloride dissolved in a beaker of water makes the beaker cold which shows that it is exothermic reaction because heat leaves the solution.
Uranium atoms are split to produce nuclear energy is an example of exothermic reaction.
Water separates into hydrogen and oxygen when an electric current is run through it that shows endothermic reaction.
Methane and oxygen are combined to produce methanol and heat is an example of exothermic reaction.
Learn more about reaction here: brainly.com/question/11231920
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<span>Answer is: pH of solution of sodium cyanide is 11.3.
Chemical reaction 1: NaCN(aq) → CN</span>⁻(aq)
+ Na⁺<span>(aq).
Chemical reaction 2: CN</span>⁻ +
H₂O(l) ⇄ HCN(aq) + OH⁻<span>(aq).
c(NaCN) = c(CN</span>⁻<span>)
= 0.021 M.
Ka(HCN) = 4.9·10</span>⁻¹⁰<span>.
Kb(CN</span>⁻) = 10⁻¹⁴ ÷
4.9·10⁻¹⁰ = 2.04·10⁻⁵<span>.
Kb = [HCN] · [OH</span>⁻]
/ [CN⁻<span>].
[HCN] · [OH</span>⁻<span>] =
x.
[CN</span>⁻<span>] = 0.021 M - x..
2.04·10</span>⁻⁵<span> = x² / (0.021 M
- x).
Solve quadratic equation: x = [OH</span>⁻<span>] = 0.00198 M.
pOH = -log(0.00198 M) = 2.70.
pH = 14 - 2.70 = 11.3.</span>
A. -3
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