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3 years ago

NEED HELP ASAP!!!!!!!!! PLEASE ANSWER IN 10 minutes or under

Chemistry

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BaLLatris [955]3 years ago

4 0

Answer:

While there is an increase in the use of reusable cloth bags, plastic shopping bags have two big advantages: Plastic bags are more durable than paper bags. They are less prone to tearing, easier to carry, and are far more useful in bad weather

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The ionization constant for acetic acid is 1.8 × 10-5, and that for hydrocyanic acid is 4 × 10-10.

mihalych1998 [28]

<u>Answer:</u>

<em>D. [H+] of the acetic acid solution is greater than that of the hydrocyanic acid solution.</em>

<u>Explanation:</u>

$CH_3 COOH(aq)+ H_2 O(l) CH_3 COO^- (aq)+H_3 O^+ (aq)$

Initial 0.1M 0 0

Change -x +x +x

Equilibrium 0.1M-x +x +x

$Ka =\frac {((x)(x))}{(0.1M-x)}$

$1.8\times10^{-5}= \frac {x^2}{(0.1M-x)}$

(-x is neglected) so we get

$1.8\times10^{-5}\times0.1=x^2\\\\x^2=1.8\times10^{-6}$

$x=\sqrt{x^2}=1.34\times10^{-3} M=H^3 O^{+}$ is the $[H^+ ]$ concnetration of acetic acid

$HCN(aq)+ H_2 O(l) CN^- (aq)+H_3 O^+ (aq)$

Initial 0.1M 0 0

Change -x +x +x

Equilibrium 0.1M-x +x +x

$Ka =\frac {((x)(x))}{(0.1M-x)}$

$4.0\times10^{-10}= \frac {x^2}{(0.1M-x)}$

(-x is neglected) so we get

$4.0\times10^{-10}\times0.1=x^2\\\\x^2=4.0\times10^{-11}$

$x=\sqrt{x^2}=6.32\times10^{-6} M=H^3 O^{+}$ is the $[H^+ ]$ concnetration of Hydrocyanic acid

Thus we see here, [H+] of the acetic acid solution $1.34 \times 10^{-3} M$ is greater than that of the hydrocyanic acid solution $6.32 \times10^{-6} M$

<u>Please note∶ </u>

To find $[OH^- ]$ we use formula $[OH^- ]= \frac {kw}{([H^+])}$

The value of kw is 1.0×10^(-14)

The $[OH^- ]$ is lesser in each solution

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Ionic bonds are formed between metal and nonmetal elements. Potassium has only one valence electron and it is stripped away in t

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Refer to the table below. Credits to https://terpconnect.umd.edu/~wbreslyn/chemistry/naming/IonicCharge2.jpg

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Since Al and Ag has (+) charges, they are going to lose electrons to form ionic bonds with other atoms.

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