Answer:
0.40 M HCN and 0.10 KCN
Explanation:
A buffer solution is defined as the aqueous mixture of a weak base and its conjugate base or vice versa.
For the systems:
0.10 M KCN 0.20 M CH3COOH: Acetic acid, CH₃COOH is a weak acid and KCN is the conjugate base of HCN. Here, you have a weak acid and a conjugate base but not the conjugate base of the acetic acid or the weak acid of KCN. Thus, <em>it is not a buffer.</em>
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1.0 M HNO3 and 1.0 M NaNO3. HNO₃ is a strong acid. Thus, this system <em>is not a buffer.</em>
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0.40 M HCN and 0.10 KCN. Here, you have HCN, the weak acid, and KCN, its conjugate base. Thus, <em>it is a buffer.</em>
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0.50 M HCl and 0.10 NaCl. HCl is a strong acid, thus, its mixture with NaCl <em>is not a buffer.</em>
Answer:
pH= 12.7
Explanation:
a)Keep an emergency kit and fresh water in your car in the event of _an unexpected event.
b) pOH= -log[OH-]
pOH= -log[5.00×10^-2]
pOH= 1.3
But pH+pOH= 14
pH= 14-pOH= 14-1.3
pH= 12.7
Answer:
semipermeability
Explanation:
partially but not freely or wholly permeable specifically : permeable to some usually small molecules but not to other usually larger particles a semipermeable membrane.
Answer:
Bonding Order = number of bonding electrons – number of antibonding electrons/2.
So for CO2, there is a total of 16 electrons, 8 of which are antibonding electrons.
So 16 – 8 = 8; divided by 2 = 4. So, 4 is the bonding order of CO2. The molecular structure of CO2 looks like this:
..~-~~..
O=C=O
..~-~~..
<span>the distance between peaks of a wave</span>