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2 years ago

what should you do if you want to decrease the rate of a chemical reaction between a solid and a liquid

Chemistry

1 answer:

Nadya [2.5K]2 years ago

6 0

Answer:increase the quantity of the solid in the reaction

Explanation:

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A sample of an ionic compound NaA, where A- is the anion of a

vitfil [10]

Answer:

a) Kb = 10^-9

b) pH = 3.02

Explanation:

a) pH 5.0 titration with a 100 mL sample containing 500 mL of 0.10 M HCl, or 0.05 moles of HCl. Therefore we have the following:

[NaA] and [A-] = 0.05/0.6 = 0.083 M

Kb = Kw/Ka = 10^-14/[H+] = 10^-14/10^-5 = 10^-9

b) For the stoichiometric point in the titration, 0.100 moles of NaA have to be found in a 1.1L solution, and this is equal to:

[A-] = [H+] = (0.1 L)*(1 M)/1.1 L = 0.091 M

pKb = 10^-9

Ka = 10^-5

HA = H+ + A-

Ka = 10^-5 = ([H+]*[A-])/[HA] = [H+]^2/(0.091 - [H+])

[H+]^2 + 10^5 * [H+] - 10^-5 * 0.091 = 0

Clearing [H+]:

[H+] = 0.00095 M

pH = -log([H+]) = -log(0.00095) = 3.02

6 0

3 years ago

Plzz!!! I need help now this is science

Neko [114]

1)300-100=200N
2)300+100=400N
3)200+100-300=300-300=0N

5 0

3 years ago

A gas has a pressure of 1.34 atm when the temperature is 237K. The gas is then heated until the temperature measures 312K. What

alexandr1967 [171]

The answer for the following question is answered below.

Therefore the new pressure of the gas is 1.76 atm.

Explanation:

Given:

Initial pressure of the gas = 1.34 atm

Initial temperature of the gas = 273 K

final temperature of the gas = 312 K

To solve:

Final temperature of the gas

We know;

From the ideal gas equation

P × V = n × R × T

So;

from the above equation we can say that

P ∝ T

$\frac{P}{T}$ = constant

$\frac{P_{1} }{P_{2} }$ = $\frac{T_{1} }{T_{2} }$

Where;

$P_{1}$ = initial pressure of a gas

$P_{2}$ = final pressure of a gas

$T_{1}$ = initial temperature of a gas

$T_{2}$ = final temperature of a gas

$P_{2}$ = $\frac{1.34*312}{237}$

$P_{2}$ = 1.76 atm

Therefore the new pressure of the gas is 1.76 atm.

6 0

3 years ago

Standard notation for 31,254,000

bearhunter [10]

That seems to be standard notation

4 0

3 years ago

What is the name for molecular compound N4O8?

zmey [24]

Tetranitrogen octoxide

8 0

3 years ago

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what should you do if you want to decrease the rate of a chemical reaction between a solid and a liquid​

what should you do if you want to decrease the rate of a chemical reaction between a solid and a liquid