This is a neutralization reaction since, the hydrogen ion, H+, from the HCl is neutralized by the hydroxide ion, OH-, from the KOH to form the water molecule, H2O and salt, KCl only.

6 0

3 years ago

What is colligative property? why does theproperty changes the way that it does when the amount of solute is increased. State an

elena-14-01-66 [18.8K]

Colligative properties are those substances that depend on the number of substances in the solution, not in the identity of that substance. The property changes the way that it does when the amount of solute is increased because it enables the solute to be scattered more. For example, the freezing point of salt water is lower than that of the pure water due to the salt ions present in water.

6 0

3 years ago

The amount of I₃⁻(aq) in a solution can be determined by titration with a solution containing a known concentration of S₂O₂⁻³(aq

puteri [66]

Answer: 0.22 M

Explanation:

$2S_2O_3^{2-}(aq)+I_3^-\rightarrow S_4O_6^{2-}(aq)+3I^-(aq)$

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{moles}{\text {Volume in L}}$

moles of $Na_2S_2O_3=Molarity\times {\text {Volume in L}}=0.440\times 0.025=0.011moles$

$Na_2S_2O_3\rightarrow 2Na^+S_2O_3^{2-}$

Thus moles of $S_2O_3^{2-}$ = 0.011

According to stoichiometry:

2 moles of $S_2O_3^{2-}(aq)$ require 1 mole of $I_3^$

Thus 0.011 moles of $S_2O_3^{2-}(aq)$ require= $\frac{1}{2}\times 0.011=5.5\times 10^{-3}$ moles of $I_3^-$

Thus Molarity of $I_3^-=\frac{5.5\times 10^{-3}}{0.025L}=0.22M$

Therefore, the molarity of $I_3^-$ in the solution is 0.22 M

5 0

4 years ago

What is the frequency of an x-Ray with a wavelength of 1.15 times 10^-10

Bezzdna [24]

V = f 入 (velocity = frequency x wavelength)
If we have the speed ( for wave in vacuum i.e. 3 x 10^8 m/s) 
Then the frequency of x-ray is 
(3 x 10^8) ÷(1.15 x 10^-10) = 2.61 x 10^18

3 0

3 years ago