PLEASE HELP WITH CHEM !! Calculate the [OH-] of each of the following solutions given the [H+]. AND Classify each of the solutions in the question above as either acid, base, or neutral. AND FIND THE PH
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Answers
pH, pOH, [H+], and [OH-] are all interrelated. For simplicity, we assume that we're working with aqueous solutions at 25 °C.
The following mathematical relations are relevant here:
pH = -log[H⁺]pOH = -log[OH⁻][H⁺] = 10^-pH[OH⁻] = 10^-pOHpH + pOH = 14[H⁺] × [OH⁻] = 10^-14A pH of 7 is neutral; a pH less than 7 is acidic; and a pH greater than 7 is basic.
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We are given four solutions of varying [H⁺], and we want to find the pH and the [OH⁻]. The pH will tell us whether the solution is neutral, an acid, or a base.
Finding the [OH⁻]Using the relationship [H⁺] × [OH⁻] = 10^-14, we can calculate the [OH⁻] of each solution by dividing 10^-14 by the given [H⁺]:
[OH⁻] = 10^-14/(3.3 × 10^-5) = 3.0 × 10^-10
[OH⁻] = 10^-14/(4.0 × 10^-8) = 2.5 × 10^-7
[OH⁻] = 10^-14/(7.2 × 10^-11) = 1.4 × 10^-4
[OH⁻] = 10^-14/(8.2 × 10^-4) = 1.2 × 10^-11
Note: While not indicated here, the units for [H⁺] and [OH⁻] are moles/liter (M).
Finding the pHTo find the pH of each solution, we take the negative logarithm of the [H⁺] with base 10, i.e., pH = -log₁₀[H⁺]:
pH = -log(3.3 × 10^-5) = 4.48
pH = -log(4.0 × 10^-8) = 7.40
pH = -log(7.2 × 10^-11) = 10.14
pH = -log(8.2 × 10^-4) = 3.09
Note that, for significant figures involving logarithms, the number of decimal places should equal the number of significant figures in the argument of our logarithm (the argument is what we're taking the -log of). Since we're taking the -log of quantities given to two significant figures, our corresponding pH values are given to two decimal places.
Acid, Base, or Neutral?As mentioned above, a pH = 7 is neutral, a pH < 7 is acidic, and a pH > 7 is basic.
4.48 < 7, so the first solution is an acid.
7.40 > 7, so the second solution is a base.
10.14 > 7, so the third solution is a base.
3.09 < 7, so the fourth solution is an acid.
Related Questions
how many atoms are in 1.6g C? Answer in units of atoms.
(no answer choices were given)
Answers
Answer:
6.022 ×10(index 23) / 7.5 = 0.8293 ×10(index 23)
Explanation:
molar mass of C = 12gmol
therefore in 12g of C there is one mole or an amount of 6.022 ×10(index 23)
∴12g/6.02210(index 23) ×1.6g
What is the charge on the cation in the ionic compound when sodium and sulfur bond?
Answers
Answer:
1+
Explanation:
Sodium has one valence electron. When it bonds with a nonmetal like sulfur, it gives up that electron to become a positively charged ion (cation) with a charge of 1+.
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Answer:
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electronegativity
the same
O larger
O smaller
Answers
Which statement describes the solar feature shooting off into space labeled C?
An envelope of plasma surrounding the sun
A stream of glowing gas that shoots out from the sun in an arch
A brief eruption of intense high-energy radiation from the sun's surface
A dark spot appearing from time to time on the sun's surface
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A 30L sample of N2 at 20*C is heated to 50*C. The pressure at 20*C was at 3 atm. What is the pressure of N2 after its temperature increased?
Answers
Volume stays constant, so: P1/T1 = P2/T2
P1 = 3 atm
T1 = 20*C = 293 K
P2 = ?
T2 = 50*C = 323 K
Solve for P2: P1T2/T1 = P2
P2 = (3 atm)(323 K)/(293 K) = 3.3 atm
The Pressure of N2 after its temperature increased will be "3.3 atm". To understand the calculation, check below.
Pressure and Temperature:According to the question,
Pressure, P₁ = 3 atm
Temperature, T₁ = 20°C or,
= 293 K
T₂ = 50°C or,
= 323 K
We know the relation,
→ [tex]\frac{P_1}{T_1}[/tex] = [tex]\frac{P_2}{T_2}[/tex]
or,
Pressure, P₂ = [tex]\frac{P_1\times T_2}{T_1}[/tex]
By substituting the values,
= [tex]\frac{3\times 323}{293}[/tex]
= [tex]\frac{969}{293}[/tex]
= 3.3 atm
Thus the above response is correct.
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1. the moderns periodic table, elements are ordered
a. according to decreasing atomic mass
b. according to mendeleev's original design
c. according to increasing atomic number
Answers
Answer:
In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom In a periodic table arranged in order of increasing
Which of these is a behavioral adaptation?
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Answer:
a brown bear hibernates and become inactive during winter
What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
Answers
We have that for the Question "" it can be said that the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules is
Amount of CO_2(g)=221.35g
From the question we are told
What is the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules?
Generally the equation for the is mathematically given as
[tex]No moles in 3*02*10^{24}=\frac{3.03*10^{24}}{6.023*10^-{23}}[/tex]
No moles in 3*02*10^{24}=5.03moles
Amount of CO_2(g)=5.03moles *44g/mol
Amount of CO_2(g)=221.35g
Hence
the mass (in grams) of 3.03 × 1024 molecules of carbon dioxide molecules is
Amount of CO_2(g)=221.35g
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What can be concluded from the following statements about a property of metats? • Acast-iron skillet on a stove is used to try bacon • A metal spoon left in a pot of soup heating on a stove is too hot to touch - An aluminum playground slide gets hot on a summer day. O A Metals combine with nonmetals.O B. Metals are good insulators. O C Metals conduct electricity D Metals conduct heat.
Answers
Answer:
D - metals conduct heat
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Answers
2) Stay Away From Your Phone or any other things that distract you.
3) Take a break after about 1-1 hour 30 minutes- break should be about 10 minutes.
4) make sure notes are complete for what you are revising for.
5) watch videos/ use class notes/ your own notes/ revision guides.
6) test yourself by answering exam style questions or by flash cards.
What is the charge of the atom in the diagram below?
A. -3
B. +1
C. 0
D.+3
Answers
Answer:
D. +3
Explanation:
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How many atoms are needed to react with 50 grams of O2 gas
Answers
Answer:
3 moles
Explanation:
3 moles atoms are needed to react with 50 grams of O2 gas.
If the [H3O+] of a solution is less than the [OH-], what can be said about the solution?
(A) The solution would have a higher pH than its pOH.
(B) The solution could still have a neutral pH.
(C) The solution would have a higher pOH than its pH.
(D) The solution would be basic only if the solution contained a weak acid.
Answers
Answer:
I was looking for this same answer.
Explanation:
If the [H₃O⁺] of a solution is less than the [OH⁻], then the solution would have a higher pH than its pOH.
How pOH is define?pOH is define as the negative logarithm of the concentration of OH⁻ ion and for a basic solution its value should be less than 7.
In the question it is clear that concentration of H⁺ ion is les than the concentration of OH⁻ ion, so the given solution is basic in nature. Basicity of basic solution is calculated by using the pOH scale and for this solution value of pOH is less than 7, because more than 7 shows the acidic character. And according to the pH scale value of this solution should be more than 7.
Hence, option (A) is correct i.e. The solution would have a higher pH than its pOH.
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What pressure is required to compress 196.0 liters of air at 1.00 atmosphere into a cylinder whose volume is 26.0 liters?
Answers
Answer:
if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is
V
1
and its pressure is
P
1
. Let us suppose that its volume has been increased to
V
2
, the as per the Boyle's law its pressure will decrease and let us assume the new pressure is
P
2
.
P
1
V
1
=
P
2
V
2
P
1
= 1 atm
V
1
= 196 L
P
2
= ?
V
2
= 26 L substitute the values;
1 atm x 196 L =
P
2
x 26 L
P
2
= 1 atm x 196 L / 26 L
P
2
= 196 atm L / 26 L = 7.53 atm
Explanation:
I hope this helps.
Answer:
7.53 atm
Explanation:
Boyle studied the relationship between the pressure of a trapped gas and its volume. The data obtained by him shows that the product of pressure and volume for the trapped air sample is constant at a constant temperature. if volume of the gas increases, its pressure decreases, and vice versa. mathematically, if the volume of the gas is V 1 and its pressure is P 1 . Let us suppose that its volume has been increased to V 2 , the as per the Boyle's law its pressure will decrease and let us assume the new pressure is P 2 . P 1 V 1 = P 2 V 2 P 1 = 1 atm V 1 = 196 L P 2 = ? V 2 = 26 L substitute the values; 1 atm x 196 L = P 2 x 26 L P 2 = 1 atm x 196 L / 26 L P 2 = 196 atm L / 26 L = 7.53 atm
What happens to pressure if temperature increases? Pressure increases. Pressure stays the same. Pressure decreases. Temperature has no effect on pressure.
Answers
Answer:
Pressure increases
Explanation:
According to Gay-Lussac's law, the pressure of a given amount of gas is directly proportional to the temperature at a given volume i.e.
[tex]P\propto T[/tex]
It means the relationship between the pressure and the temperature is direct.
If the temperature increases, the pressure of the gas also increases. Hence, the correct option is (A).
Based on the methods used in the video, answer the following gram to gram conversion question:
2 C2H6 + 7 O2 --------> 4 CO2 + 6 H2O
In the combustion of ethane (C2H6), 4.12 grams of water (H2O) was produced. How much ethane (C2H6), in grams, was used in this reaction?
molar mass H2O= 18.02 g/mol
molar mass C2H6= 30.08 g/mol
2.47 g C2H6
2.29 g C2H6
20.63 g C2H6
20.97 g C2H6
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Answer:B
Explanation:
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What is the identity of this diamotic gas?
Answers
Answer:
Tungsten(VI) fluoride, also known as tungsten hexafluoride, is an inorganic compound with the formula WF6. It is a toxic, corrosive, colorless gas, with a density of about 13 g/L (roughly 11 times heavier than air.[
Explanation:
The WF6 molecule is octahedral with the symmetry point group of Oh. The W–F bond distances are 183.2 pm. Between 2.3 and 17 °C, tungsten hexafluoride condenses into a pale yellow liquid having a density of 3.44 g/cm^3 at 15 °C. At 2.3 °C it freezes into a white solid having a cubic crystalline structure, the lattice constant of 628 pm, and a calculated density of 3.99 g/cm^3. At −9 °C this structure transforms into an orthorhombic solid with the lattice constants of a = 960.3 pm, b = 871.3 pm, and c = 504.4 pm, and the density of 4.56 g/cm3. In this phase, the W–F distance is 181 pm, and the mean closest intermolecular contacts are 312 pm. Whereas WF6 gas is one of the densest gases, with the density exceeding that of the heaviest elemental gas radon (9.73 g/L), the density of WF6 in the liquid and solid-state is rather moderate. The vapor pressure of WF6 between −70 and 17 °C can be described by the equation
log10 P = 4.55569 −
1021.208
T + 208.45,
where the P = vapor pressure (bar), T = temperature (°C).
30 points if you tell me your favorite food! ☺️
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Answer:
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Explanation:
:D
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Answers
Answer: The respiratory system
Explanation: It includes the nose, mouth, throat, voice box, windpipe, and lungs. Air enters the respiratory system through the nose or the mouth.
If you squeeze a sealed bottle in the middle, what force is applied at the top of the bottle?
A) less force
B) more force
C) the same force
D) cannot be predicted
Answers
The leaves of African violets develop roots and form new
plants when they are placed in water or moist soil. Any leaf
'on the African violet plant shown can produce a new
African violet plant.
Which two terms best describe this kind of reproduction?
O A. Sexual reproduction
B. Vascular reproduction
O O O O
C. Vegetative reproduction
D. Asexual reproduction
Help pls
Answers
Answer:
vegetative reproduction and asexual reproduction
Explanation:
Answer:
Asexual and vegetation reproduction
Explanation:
Freon, a very useful refrigerant, is produced in the following reaction:
3CCl4 (g) + 2SbF3 (s) → 3CCl2F2 (g) + 2 SbCl3 (s)
If a chemist wants to make 3.0 x 106 moles of Freon using excess carbon tetrachloride, how many moles of antimony trifluoride will the chemist need?
Answers
Answer:
The chemistry will need 2*10⁶ moles of antimony trifluoride.
Explanation:
The balanced reaction is:
3 CCl₄ (g) + 2 SbF₃ (s) → 3 CCl₂F₂(g) + 2 SbCl₃ (s)
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
CCl₄: 3 moles SbF₃: 2 moles CCl₂F₂: 3 molesSbCl₃: 2 molesYou can apply the following rule of three: if by reaction stoichiometry 3 moles of freon are produced by 2 moles of antimony trifluoride, 3*10⁶ moles of Freon are produced from how many moles of antimony trifluoride?
[tex]moles of antimony trifluoride=\frac{3*10^{6} moles of freon*2 moles of antimony trifluoride}{3 moles of freon}[/tex]
moles of antimony trifluoride= 2*10⁶
The chemistry will need 2*10⁶ moles of antimony trifluoride.
METHANOL + ETHANOIC ACID
Answers
if you’re looking for a balanced equation it would be:
Methanol +ethanoic acid ==> methyl ethanoate + water ( in the presence of concentrated sulfuric acid )
CH3OH + CH3COOH==> CH3COOCH3 + H2O
~~~~~~
But, if you were looking for what it would be called it would be:
ethanoic acid with methanol will produce methyl ethanoate.
~~~~~~
And the reaction between Methanol and Ethanoic acid is known as esterification.
~~~~~~
I wasn’t sure of your question so I answered the best way that I could. I hope this helped!
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Explanation:
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A
square is a diagram used to predict all possible allele combinations from a genetic
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a weather balloon expands from 3.00 L to 3.25 L. The atmospheric pressure is 0.96 atm. How much work was done on the surroundings?
I really, really, really need help with this. I've been struggling so much to understand thermochemistry!
Answers
Answer:
0.96
Explanation:
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1,3-dimethyl, 3-ethylcyclohexane
1-ethyl, 1,4-dimethylcyclohexane
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Answer:
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