Question

estion 14 of 65 > Use the pH lab to rank the solutions by pH. Highest pH Lowest pH Answer Bank red and blue litmus paper stay the same color [OH-] = 10-'M universal indicator turns the solution violet [H+] = 10-'M universal indicator turns the solution red

Answer 1

A)

Highest pH to low pH arrangement

When strong base pH>11 is there , the universal indicator turns violet  

1) universal inficindi turns violet

2) [H+]= 10^-9 M

pH = -log(H⁺)

pH = -log(10^-9)

pH = 9

3) red and blue litmus colour remains same

So ph~ 7

4)

[OH-] = 10^-9 M

[H+][OH-]= 10^-14 M

[H+] = 10^-5 M

pH = -log[H+]

pH = -log[10^-5]

pH = 5

5)

Universal indicator turns red when solution

pH < 3

B)

Buffer consists of HClO and NaOCl

$HOCl \rightleftharpoons H^{+}+ OCl^{-}$

When base such as NaOH added

The OH- ion is balanced by H+ ion

$H^{+}+ OH^{-}\rightarrow H_{2}O$

C)

The bond between metal and non metal is

mostly ionic bond

Ionic bond is formed because of electrostatic attraction between metal and non metal

D)

Option d) correctly represents saturated solution

In saturated solution undissolved solute will be in bottom indicating saturated solution

E)

$HCN + H_{2}O\rightleftharpoons H_{3}O^{+}+ CN^{-}$

$K_{a}= \frac{[H_{3}O^{+}][CN^{-}]}{[HCN][H_{2}O]}$

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