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olga2289 [7]
3 years ago
5

Which indicator would be the best to use for a titration between 0.20 m hi with 0.10 m ba(oh)2? you will probably need to consul

t the appropriate table in the book?
Chemistry
2 answers:
Mars2501 [29]3 years ago
8 0
1. alizarin yellow R, color change at pH 10-12
2. thymol blue, color change at pH 2-4
3. methyl red, color change at pH 3-5
4. phenolphthalein, color change at pH 8-10
<span>5. bromothymol blue, color change at pH 6-8

These are the list of indicators that we have to choose from them and the correct answer will be 5) Bromothymol blue, due to color change at pH 6-8
Due to both HI is strong acid and Ba(OH)</span>₂ is strong base so the formed salt BaI₂ will has pH = 7 and the equivalence point will be 7 so it will be in the effective range of Bromothymol blue
serious [3.7K]3 years ago
4 0

The indicator that is used for the endpoint at ${\text{pH}}$ 7 is $$\boxed{{\text{bromothymol blue}}}$$ .

Further Explanation:

<u>Neutralization reaction:</u>

It is the reaction that occurs between an acid and a base in order to form salt and water. It is named so as it neutralizes the excess amount of hydrogen or hydroxide ions present in the solution. It is used to decrease the acidity in the stomach, wastewater treatment, antacid tablets, and to control the pH of soil. An example of a neutralization reaction is,

$${\text{HCl}}+{\text{NaOH}}\to{\text{NaCl}}+{{\text{H}}_2}{\text{O}}$$

The indicator is generally a weak acid or weak base that is utilized to determine the ${\text{pH}}$ change of the solution. An indicator when dissolved in water dissociates into the ions and  give color. Acid-base indicators are used in neutralization reaction.

The titration between HI and $${\text{Ba}}{\left({{\text{OH}}}\right)_{\text{2}}}$$ would result in the following neutralization reaction.

$2{\text{HI}}+{\text{Ba}}{\left( {{\text{OH}}}\right)_2}\to{\text{Ba}}{{\text{I}}_2}+2{{\text{H}}_{\text{2}}}{\text{O}}$

According to the balance reaction, 2 moles of HI is needed to completely neutralize 1 mole of $${\text{Ba}}{\left({{\text{OH}}}\right)_{\text{2}}}$$ .

When the volume of solution is 1 L then the number of moles of HI in 0.20 M solution is 0.20 mol. Also, the number of moles of $${\text{Ba}}{\left({{\text{OH}}}\right)_{\text{2}}}$$ present in 0.10 M is 0.10 mol.

Since 1 mole of $${\text{Ba}}{\left({{\text{OH}}}\right)_{\text{2}}}$$ can completely neutralized 2 moles of HI and give 1 mole of ${\text{Ba}}{{\text{I}}_2}$ , therefore, for 0.10 moles of $${\text{Ba}}{\left({{\text{OH}}}\right)_{\text{2}}}$$  is completely neutralize 0.20 moles of HI and give 0.10 moles of ${\text{Ba}}{{\text{I}}_2}$ . Since it is neutralization reaction and thus the final ${\text{pH}}$ of the solution is 7.

Therefore, the indicator that is used for the endpoint at ${\text{pH}}$ 7 is bromothymol blue that has a ${\text{pH}}$ range from pH 6.0 to 7.6.

Learn more:

1. Some amino acids have “acids” in their name but still, they are basic in aqueous solution why?: <u>brainly.com/question/5050077</u>

2. Determine how many moles of water produce: <u>brainly.com/question/1405182</u>

Answer details:

Grade: Senior school

Subject: Chemistry

Chapter: Acid-base reactions

Keywords: Acids, bases, titrations, pH, number of moles neutratliztion reactions, HI, ba(oh)2, 2 mole and 1 mole.

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25 g of NH, is mixed with 4 moles of O, in the given reaction:
FromTheMoon [43]

Answer:

a. NH3 is limiting reactant.

b. 44g of NO

c. 40g of H2O

Explanation:

Based on the reaction:

4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(l)

4 moles of ammonia reacts with 5 moles of oxygen to produces 4 moles of NO and 6 moles of water.

To find limiting reactant we need to find the moles of each reactant and using the balanced equation find which reactant will be ended first. Then, with limiting reactant we can find the moles of each reactant and its mass:

<em>a. </em><em>Moles NH3 -Molar mass. 17.031g/mol-</em>

25g NH3*(1mol/17.031g) = 1.47moles NH3

Moles O2 = 4 moles

For a complete reaction of 4 moles of O2 are required:

4mol O2 * (4mol NH3 / 5mol O2) = 3.2 moles of NH3.

As there are just 1.47 moles, NH3 is limiting reactant

b. Moles NO:

1.47moles NH3 * (4mol NO/4mol NH3) = 1.47mol NO

Mass NO -Molar mass: 30.01g/mol-

1.47mol NO * (30.01g/mol) = 44g of NO

c. Moles H2O:

1.47moles NH3 * (6mol H2O/4mol NH3) = 2.205mol H2O

Mass H2O -Molar mass: 18.01g/mol-

2.205mol H2O * (18.01g/mol) = 40g of H2O

3 0
3 years ago
Read 2 more answers
Vinegar is a solution of acetic acid (the solute) in water (the solvent) with a solution density of 1010 g/L. If vinegar is 0.80
Damm [24]

Answer:

4.8 %

Explanation:

We are asked the concentration in % by mass, given the molarity of the solution and its density.

0.8 molar solution means that we have 0.80 moles of acetic acid in 1 liter of solution. If we convert the moles of acetic acid to grams, and the 1 liter solution to grams, since we are given the density of solution, we will have the values necessary to calculate the % by mass:

MW acetic acid = 60.0 g/mol

mass acetic acid (the solute) = 0.80 mol x 60 g / mol = 48.00 g

mass of solution = 1000 cm³ x 1.010 g/ cm³      (1l= 1000 cm³)

                            = 1010 g

% (by mass) = 48.00 g/ 1010 g  x 100 = 4.8 %

6 0
3 years ago
Your boss tells you that water at 68 F is flowing in a cooling tower loop at a rate of 600 gpm, in an 8-inch inside diameter pip
avanturin [10]

Explanation:

The volumetric flow rate of water will be as follows.

       q = 600 gpm \times \frac{0.000063 m^{3} s^{-1}}{1 gpm}

         = 0.0378 m^{3}/s&#10;

    Diameter = 8 in \times \frac{0.0254 m}{1 in}

                   = 0.2032 m

Relation between area and diameter is as follows.

           A = \frac{\pi}{4} \times D^{2}

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               = 0.785 x 0.2032 x 0.2032

               = 0.0324 m^{2}

Also,     q = A × V

or,         V = \frac{q}{A}

                = \frac{0.0378 m^{3}/s}{0.0324 m^{2}}

                = 1.166 m/s

As, viscosity of water = 1 cP = 10^{-3} Pa-s

Density of water = 1000 kg/m^{3}

Therefore, we will calculate Reynolds number as follows.

 Reynolds number = \frac{D \times V \times density}{viscosity}

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                                = 236931.2

Hence, the flow will be turbulent in nature.

Thus, we can conclude that the Reynolds number is 236931.2 and flow is turbulent.

8 0
3 years ago
What would be the volume in millilitres of a blood sample of 2.15 microliters (ul)?​
Zanzabum

2.15 x 10⁻³mL

Explanation:

Given parameter:

    Volume of blood sample in uL = 2.15uL

Conversion           uL → mL

   micro- and milli-  are both prefixes of sub-units.

liter is a unit of volume of a substance.

       micro - is 10⁻⁶

       milli- is of the order 10⁻³

The problem is converting from micro to milli:

     if we multiply  10⁻⁶ by 10³ we would have our milli;

  1000uL = 1mL

  2.15uL :   2.15uL x \frac{1mL}{1000uL} = 2.15 x 10⁻³mL

learn more:

Volume brainly.com/question/5055270

#learnwithBrainly

4 0
3 years ago
Write Qc for each of the following:(1) Gaseous sulfur tetrafluoride reacts with liquid water to produce gaseous sulfur dioxide a
snow_tiger [21]

Answer : The expression for reaction quotient will be :

(1) Q_c=\frac{[SO_2][HF]^4}{[SF_4]}

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Explanation :

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(1) The given balanced chemical reaction is,

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Q_c=\frac{[SO_2][HF]^4}{[SF_4]}

(2) The given balanced chemical reaction is,

2MoO_2(s)+XeF_2(g)\rightarrow 2MoF(l)+Xe(g)+2O_2(g)[/texIn this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.  So, the expression for reaction quotient will be :[tex]Q_c=\frac{[O_2]^2[Xe]}{[XeF_2]}

7 0
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