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Bogdan [553]
3 years ago
5

The acid ionization equilibrium for the weak acid HF is represented by the equation above. To prepare a buffer with a pH=3.50, a

student needs to mix 250.mL of 0.100MHF and 250.mL of 0.100MKF. If the student mistakenly mixes 250.mL of 0.0500MHF and 250.mL of 0.0500MKF, which of the following is the result of this error?
The buffer will have a lower capacity because of the smaller number of moles of HF and F− available to react if an acid or base is added.

The buffer will have a lower capacity because of the smaller number of moles of H F and F with a negative 1 charge available to react if an acid or base is added.


The buffer will have a lower capacity because the smaller amount of HF and F− will lower the pH of the buffer, and buffers of lower pH have a lower buffer capacity.

The buffer will have a lower capacity because the smaller amount of H F and F with a negative 1 charge will lower the p H of the buffer, and buffers of lower p H have a lower buffer capacity.


The buffer will have a higher capacity because a larger proportion of HF and F− will ionize at lower concentrations, resulting in the neutralization of any added acid or base.

The buffer will have a higher capacity because a larger proportion of H F and F with a negative 1 charge will ionize at lower concentrations, resulting in the neutralization of any added acid or base.


The buffer will have the same capacity because the large volume of the buffer solution dilutes any added acid or base
Chemistry
1 answer:
inessss [21]3 years ago
5 0

Answer:

4

Explanation:

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Radium decays to form radon. Which equation correctly describes this decay?<br><br> its D
netineya [11]

Answer:

The equation that correctly describes the decay is :

\frac{226}{88}Ra -----> \frac{222}{86}Rn + \frac{4}{2}He

Explanation:

When the solid radium start decaying in order to form the radon gas, it starts losing two protons with one neutron. The two neutron as well as one proton together forms an alpha particle, hence a type of radiation is formed. Also we know that radon itself is radioactive as it also leads to the decay, after that it loses an alpha particle and also form an element called as polonium. Radium being the most stable form of isotope, radium 226, also holds a half life of 1600 years. It will decay into radon 222 through the alpha decay or can also lead 212 by ejecting a carbon 14 nucleus.

4 0
3 years ago
Read 2 more answers
1. Which category of organisms contains heterotrophic eukaryotes that can reproduce
marysya [2.9K]

Answer: What kingdom is an organism with these characteristics: Eukaryotic, Multicellular,. Heterotrophic, Reproduce Sexually, and Most have the ability to move on their ...

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please brainleast

Explanation:

8 0
3 years ago
A sample of hydrogen nitrate or nitric acid, HNO 3 contains 18.8 x 1022 molecules.
IgorC [24]

Answer:

19.7 g.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to realize this problem can be solved by using a molecules-moles-mass relationship, starting with the given molecules, using the Avogadro's number and the molar mass of nitric acid (63.01 g/mol):

18.8x10^{22}molec*\frac{1mol}{6.022x10^{23}molec}* \frac{63.01g}{1mol} \\\\=19.7g

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6 0
3 years ago
According to the bottle, a serving size of Gatorade is 240 mL. The molar mass of Red Dye #40 is 496.43 g/mol. Use this informati
alexgriva [62]

Answer:

mass Red Dye 40 = 0.0696 mg

Explanation:

aas found by means of quantitative methods of analysis of dyes in sports drinks:

⇒ [Red Dze 40] = 5.842 E-7 mol/L

analysis performed at a wavelength of 504 nm; value that is below the allowable limits for these drinks.

∴ mass of Red Dye ingested:

⇒ mass Red Dye = (5.842 E-7 mol/L)(496.43 g/mol)(1000 mg/g)(0.240 L)

⇒ mass Red Dye = 0.0696 mg

5 0
4 years ago
How many grams of water are produced when 2.50 mol oxygen reacts with hydrogen
masha68 [24]

Given:

2.5 mol O2

Required:

Grams of water

Solution:

2H2 + O2 -> 2H2O

Moles of H2O = (2.5 mol O2)(2 moles H2O/1 mole O2) = 5 moles H2O

Molar mass of H2O = 18.02 g/mol

Mass of H2O = (5 moles H2O)( 18.02 g/mol)

<span>Mass of H2O =90.1g H2O</span>
5 0
3 years ago
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