9. A strong acid is used as a titrant against a weak base. What would be the most likely pH for the equilibrium point? A.2.1 O B. 7.0 O C.8.2 O D. 6.6
D. 6.6
Strong acid pH range < 3
weak base pH range 8-11
A strong acid is used as a titrant against a weak base. The most likely pH for the equilibrium point will be 6.6.
What is pH?pH, a scale that quantifies the acidity as well as basicity of liquid solutions that are aqueous or other.
What is acid?Any acid which entirely ionizes in solutions would be considered a strong acid. This indicates that when dissolved in a solution, it emits the most hydrogen ions as well as protons.
The pH will not neutral there at an equivalence point when a weak base is compared to a strong acid. The solution is just in fact acidic (pH ≅ 6.6) there at the equivalency point.
Therefore, the correct answer will be option (D).
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again could someone help me on this?
Answer:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Explanation:
Celsius, Fahrenheit and Kelvin are the three common temperature scales.
Formation of Ionic bond
1. Formation of magnesium fluoride.
Answer:
Magnesium fluoride is prepared from magnesium oxide with sources of hydrogen fluoride such as ammonium bifluoride: MgO + (NH4)HF2 → MgF2 + NH3 + H2O. Related metathesis reactions are also feasible. The compound crystallizes as tetragonal birefringent crystals.
Balance the following chemical equation (if necessary):
C5H10O(I) + O2(g) ==> H2O(g) + CO2(g)
Answer:
C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Explanation:
In the original equation: C₅H₁₀O (l) + O₂ (g) --> H₂O (g) + CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 3 oxygen
Products: 1 carbon, 2 hydrogen, 3 oxygen
Cleary, the equation is not balanced. When deciding which element to balance first, avoid balancing elements that are present in more than one molecule on either side (ex. the oxygen on the reactant side). In this case, I started with carbon. Once the carbon was balanced, I balanced the hydrogen, keeping in mind the new coefficients I added when balancing the carbons. Lastly, I balanced the oxygen.
The balanced equation: C₅H₁₀O (l) + 7 O₂ (g) --> 5 H₂O (g) + 5 CO₂ (g)
Reactants: 5 carbon, 10 hydrogen, 15 oxygen
Products: 5 carbon, 10 hydrogen, 15 oxygen
Radioactive iodine, lodine 131, is used in Thyroid cancer therapies. Its half life is 8
days. If a patients is given a total dose of 1 gram of lodine 131, how much will be
left in the patients blood stream after 32 days? *include units*
PLSS HELP!!
Answer: 0.0625 grams left in the patients blood stream
Explanation:
half life formula: A = o(1/2)^t/d
A represents answer, o represents original amount of iodine used, t represents time iodine is used for, d represnts half life of iodine.
A = 1(1/2)^32/8
A = 0.0625 grams left in the patients blood stream
How do you think new technology has helped scientists learn about genes and proteins?
Answer:
Advances in Technologies with Relevance to Biology: The Future Landscape
This chapter provides an overview and a perspective on the breadth and types of technologies that may have an impact on the life sciences enterprise of the future, with the understanding that there are inherent difficulties in anticipating or predicting how any of these technologies alone or in combination will alter the nature of the future threat “landscape.”
Rather than attempt to cover the technology landscape in a comprehensive manner, this chapter (1) highlights technologies likely to have obvious or high-impact near-term consequences; (2) illustrates the general principles by which technological growth alters the nature of future biological threats; and, (3) highlights how and why some technologies are complementary or synergistic in bolstering defense against future threats while also enhancing or altering the nature of future threats.
.
Explanation:
The change in free energy can best be described as
A. the energy level of the reactants.
B. the maximum energy level of the reaction.
C. the difference in energy between reactants and products.
D. the energy level of the products.
E. the difference in energy between reactants and the maximum energy.
Answer:
Letrang A o B o C o D or Letter A or B or C or D
A solution of sodium oxalate (Na 2C 20 4) in acidic solution is titrated with a solution of potassium permanganate (KMnO 4) according to the following
balanced chemical equation:
2KMnO4(aq) + 8H2SO4(aq) + 5Na2C204(aq) 2MnSO4(aq) - 8H20() +10C02(9) + SNa2SO4(aq) + K2SO4(aq)
What volume of 0.0206 M KMnO4 is required to titrate 0.176 g of Na2C204 dissolved in 50.0 mL of solution?
O a. 8. 54 ml
O b. 500 ml
OC 25 5 ml
O d.3.42 m
e. 63 8 ml
X
The volume of 0.0206 M KMnO₄ required to titrate 0.176 g of Na₂C₂O₄ dissolved in 50.0 mL of solution is 25.5 mL (Option C)
How to determine the mole of Na₂C₂O₄Mass of Na₂C₂O₄ = 0.176 gMolar mass of Na₂C₂O₄ = 134 g/mol Mole of Na₂C₂O₄ =?
Mole = mass / molar mass
Mole of Na₂C₂O₄ = 0.176 / 134
Mole of Na₂C₂O₄ = 1.313×10¯³ mole
How to determine the mole of KMnO₄2KMnO₄ + 8H₂SO₄ + 5Na₂C₂O₄ —> 2MnSO₄ + 8H₂O +10CO₂ + 5Na₂SO₄ + K₂SO₄
From the balanced equation above,
5 moles of Na₂C₂O₄ reacted with 2 moles of KMnO₄
Therefore,
1.313×10¯³ mole of Na₂C₂O₄ will react with = (1.313×10¯³ × 2) / 5 = 5.252×10¯⁴ mole of KMnO₄
How to determine the volume of KMnO₄Mole of KMnO₄ = 5.252×10¯⁴ moleMolarity of KMnO₄ = 0.0206 MVolume of KMnO₄ =?Volume = mole / molarity
Volume of KMnO₄ = 5.252×10¯⁴ / 0.0206
Volume of KMnO₄ = 0.0255 L
Multiply by 1000 to express in mL
Volume of KMnO₄ = 0.0255 × 1000
Volume of KMnO₄ = 25.5 mL
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Sodium is metal or nonmetal
Answer:
sodium is a metal,It's known as soft and silvery.
What is the relationship between the number of molecules and the mass of 22.4 L of different gases at STP?
The volume occupied by one mole of gas at stp is known as the standard molar volume of a gas. It has been found to be 22.41410 L. According to Avagadro's law, one mole of any gas will occupy the same volume as one mole of any other gas at the same temperature and pressure, despite mass difference. Knowing the volume of gas, you can use 1 mol/22.4L as a conversion factor to find the number of moles, and therefore the mass, of a given volume of a given gas at STP.
Behaviour of gases:
In gases, the molecules are far apart and mutual interaction amongst the molecules are negligible except when they collide.At low temperature and high pressure, the gases follow a simple reaction:ㅤㅤㅤ ➝ PV = KT
PLEASE HELP ME ASAP SCREENSHOT DOWN BELOW
Answer:
Elevation.
Explanation:
Although latitude is a very important factor in temperature, Las Vegas and Mt. Charleston are pretty close to each other, which makes me think that elevation would be the only thing that could explain the extreme difference in temperature.
A sample of neon gas has a volume of 10.0 L at 500, mm Hg. What new pressure is needed to change the
volume to 6.0 L? (T constant).
Hence, the new pressure of the neon gas is 833.3 mm Hg.
To calculate the new pressure, we apply Boyle's law
Boyle's lawBoyle's law state that, at a constant temperature, the volume of a given mass of gas is inversely proportional to its pressure.
Formula:
PV = P'V'..............Equation 1Where:
P = Initial pressure of neon gasV = Initial volume of neon gasP' = Final pressure of neon gasV' = Final volume of neon gasMake P' the subject of the equation
P' = PV/V'............ Equation 2From the question,
Given:
V = 10 LP = 500 mm HgV' = 6 LSubstitute these values into equation 2
P' = 10(500)/6P' = 5000/6P' = 833.3 mm HgHence, the new pressure of the neon gas is 833.3 mm Hg.
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Give differences between acids and bases
Answer:
An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons. An acid is a proton donor. A base accepts a proton.Explanation:
What is the molarity of a solution that contains 4.50 mol of NaF dissolved in 750.0 mL of solution
Answer:
6.00 Ml
Explanation:
I hope this helps
Help me with this question
[tex]\Large \text{1)}[/tex]
[tex]\textbf{Use the formula and substitute the values}[/tex]
[tex]\displaystyle 0.3\ mol/L = \frac{n \ mol}{10 \times 10^{-3}\ L}[/tex]
[tex]\textbf{Solve for the number of moles}[/tex]
[tex]n = 0.003\ mol[/tex]
[tex]\textbf{Calculate final volume }[/tex]
[tex]40+10=50\ mL[/tex]
[tex]\textbf{Number of moles remains same. Solve for concentration}[/tex]
[tex]\displaystyle C=\frac{0.003\ mol}{50 \times 10^{-3}\ L} =0.06\ mol/L[/tex]
[tex]\Large \text{2)}[/tex]
[tex]\displaystyle DF=\frac{V_f}{V_i}[/tex]
[tex]\displaystyle DF=\frac{50}{10}=5[/tex]
The molar mass of PdCl2 is The molar mass of PdCl2 is
Answer:
176.9 g/mol
Explanation:
You have to add the molar masses of the constituent atoms. The molar mass of palladium is 106.42 g/mol and the molar mass of chlorine is 35.45g/mol so 106 + 2(35.45) = 176.9 g/mol
A container with a volume 2.0L is filled with a gas at a pressure of 1.5 atm. By decreasing the volume of the container to 1.0 L, what is the resulting pressure? Type in your answer using the correct number of significant figures . Remember to use formula for Boyles law; P1V1=P2V2
Need help with this question!!!
Answer:
P2 = 3
Explanation:
u know that:
V1 = 2.0L
P1 = 1.5 atm
V2 = 1.0L
P2 = ? (p1v1=p2v2)
1.5x2 = P2x1.0
3=P2x1.0 =>> 3.0 =P2
divided both side by 1.0 the remove 1.0 (left P2)
The pressure by decreasing the volume to 1 L will be [tex]P_2=3 \ atm[/tex]
what will be a new pressure?The given data is that
Volume [tex]V_1=2 \ Litres[/tex]
Pressure [tex]P_1=1.5\ atm[/tex]
When volume is reduced to
[tex]V_2=1\ liters[/tex]
By using Boyles Law
[tex]P_1V_1=P_2V_2[/tex]
[tex]P_2=\dfrac{P_1V_1}{V_2}[/tex]
[tex]P_2=\dfrac{2\times 1.5}{1} =3 \ atm[/tex]
Thus the pressure by decreasing the volume to 1 L will be [tex]P_2=3 \ atm[/tex]
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How many atoms are in 4 L of Neon
Answer:
this is the answer to the question 0.1962
Explanation:
4/20.18
=0.1962
Natural resources are distributed ____across the Earth.
Question 2 options:
underground
safely
easily
unequally
Answer:
unequally
Explanation:
this is because many different physical factors vary massively over the earth
Which three sentences describe how a cyclone device works?
The pH of a basic solution is 9.77. What is [OH⁻]?
The [OH⁻] of the solution is 5.37×10⁵ M.
What is pOH?This is the negative logarithm to base 10 of hydroxy ion [OH⁻] concentration.
To calculate the hydroxy ion [OH⁻] concentration we use the formula below.
Note:
pH+pOH = 14pOH = 14-pHpOH = 14-9.77pOH = 4.27Formula:
[OH⁻] = 1/[tex]10^{pOH}[/tex]................. Equation 1Given:
pOH = 4.27Substitute the value into equation 1
[OH⁻] = 1/[tex]10^{4.27}[/tex][OH⁻] = 5.37×10⁵Hence, The [OH⁻] of the solution is 5.37×10⁵ M.
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The concentration of the hydroxide ion [OH¯] in the solution is 5.89×10¯⁵ M
How to determine the pOHFrom the question given above, the following data were obtained:
pH = 9.77pOH =?pH + pOH = 14
9.77 + pOH = 14
Collect like terms
pOH = 14 – 9.77
pOH = 4.23
How to determine [OH¯]pOH = 4.23Concentration of Hydroxide ion [OH¯] =?pOH = –Log [OH¯]
4.23 = –Log [OH¯]
Multiply through by –1
–4.23 = Log [OH¯]
Take the anti-log of –4.23
[OH¯] = anti-log (–4.23)
[OH¯] = 5.89×10¯⁵ M
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5.The energy level with which of the following quantum-number descriptions can contain the most electrons?
a. n = 2 , l = 1 b. n = 3, l = 2
c. n = 4, l = 3 d. n = 5 , l = 0 e. n = 5 , l = 3, m = +1
Please can someone answer it correctly,If u answer it correctly I will mark u brilliant
They are oxidised in the body into simple sugars like glucose.
Carbohydrates #5They are also known as dietary fibres.
Roughage#6They are chemical substances that help in maintaining a healthy body.
Enzymes#8Not proper functioning of thyroid gland.
HypothyroidismHow many atoms are in a sample of iron weighing 14.56 g?
Do not report units in your answer. Report your answer in scientific
notation, with two places past the decimal point.
Answer:
1.570065717611
Explanation:
atomic mass and grams of sample, this gives you he amounts of atoms
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If a solution has a concentration of 12 M when the volume is 150 mL. What is the new concentration if you increase the volume to 600 mL? (1
sig fig)
M
Answer:
The idea with diluting a solution is that the number of moles of solute will remain constant after the initial solution is diluted. The only ...
Explanation:
hope it helps you
write an introductory text about metals, adding details you know
Which is not a physical property?
ability to combine with hydrogen
hardness
ability to conduct electricity
bolling point
Answer: Ability to combine with hydrogen
Explanation:
The ability to combine with another substance is called reactivity and it is classified as a chemical property, not physical
What is the new temperature when 10L at 5K is compressed to 4.00L?
Answer:
2k
Explanation:
Consider the following reaction: 3NH,NO,
Na PO, (NH), PO, + 3NaNO,
Assuming we started with 30 grams of
ammonium nitrate and 50 grams of sodium
phosphate. Which of the reagents is the
limiting reagent?
Answer:
installe mo TRUE ID
Explanation:
bobo ang brainly
what is the mole ratio of O2 (g) to CO2 (g)?
Answer:
O2=1
CO2=2
1:2
aah its the answer