exoticbunnylover123

18.11.2019 • 

Chemistry

Determine whether each of the following is true or false for a weak base. drag the appropriate items to their respective bins. true or false

a weak base has a strong conjugate acid.

a weak base has a small value of kb.

a weak base has a small value of kb.

a weak base is completely dissociated in an aqueous solution.

a weak base has a weak conjugate acid.

a weak base s slightly dissociated in an aqueous solution.

=write the equation of dissociation for ethylamine.

=what is the value of kw at 25 ∘c?

=strong acids and bases completely dissociate in water. use the table in the introduction to classify the following chemical compounds as strong acids, weak acids, strong bases, and weak bases. drag the appropriate items to their respective bins.

strong acids

hbrhbr

hclo4hclo4

weak acids

h3po4h3po4

h2sh2s

strong bases

nh3nh3

mg(cn)2mg(cn)2

weak bases

liohlioh

ca(oh)2ca(oh)2

=ldentify acid, base, conjugate acid, conjugate base, and the relative strengths of the species involved in the reactions.

use the labels on the left to label the equations on the right.

species hci+nh3 yield nh4+cl-

strength?

Ответ:

jovillo

05.05.2021

Chemistry

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Heat can be calculated using the formula:

U = mCpΔT

where:

U = internal energy or heat
m = mass of substance
Cp = specific heat capacity of a substance (constant)
ΔT = change in temperature = (Tf - Ti)

In the problem, we are given all these terms except for the Cp, which can help identify what the substance is. This is because Cp is unique and constant for a particular substance.

9760 = 200(Cp)(45-25)
Cp = 2.44 J/g-°C

Now, look for a library or list of specific heat capacities. Look for a substance that has the closest value to what you calculated. Based on data, the substance used is ethyl alcohol which has a Cp of exactly 2.44 J/g-°C

You can use this as reference: http://www.engineeringtoolbox.com/specific-heat-capacity-d_391.html

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