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Sophie [7]
3 years ago
15

Antacid has a pH of 11. What does that tell you about its concentration of hydrogen ions? What does that tell you about its conc

entration of hydroxide ions?
Chemistry
1 answer:
MAVERICK [17]3 years ago
3 0

Answer: The concentration of hydrogen ions is 10^{-11}M and the concentration of hydroxide ions is 10^{-3}M. Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.  

pH=-\log [H^+]

pOH=-\log[OH^-]

Putting in the values:

11=-\log[H^+]

[H^+]=10^{-11}M

pH+pOH=14

pOH=14-11=3

3=-log[OH^-]

[OH^-]=10^{-3}M

Thus the concentration of hydroxide ions is more than the concentration of hydrogen ions.

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The following reaction shows the products when sulfuric acid and aluminum hydroxide react.
Elden [556K]

The correct answer is approximately 11.73 grams of sulfuric acid.

The theoretical yield of water from Al(OH)3 is lower than that of H₂SO₄. As a consequence, Al(OH)3 is the limiting reactant, H₂SO₄ is in excess.

The balanced equation is:

2Al(OH)₃ + 3H₂SO₄ ⇒ Al₂(SO₄)₃ + 6H₂O

Each mole of Al(OH)3 corresponds to 3/2 moles of H₂SO₄. The molecular mass of Al(OH)3 is 78.003 g/mol. There are 15/78.003 = 0.19230 moles of Al(OH)3 in the five grams of Al(OH)3 available. Al(OH)3 is in limiting, which means that all 0.19230 moles will be consumed. Accordingly, 0.19230 × 3/2 = 0.28845 moles of H₂SO₄ will be consumed.

The molar mass of H₂SO₄ is 98.706 g/mol. The mass of 0.28845 moles of H₂SO₄ is 0.28845 × 98.706 = 28.289 g

40 grams of sulfuric acid is available, out of which 28.289 grams is consumed. The remaining 40-28.289 = 11.711 g is in excess, which is closest to the first option, that is, 11.73 grams of H₂SO₄.

6 0
3 years ago
Ionic compounds are held together with ionic bonds between ions. The ions are formed when valence electrons are
Elza [17]

Answer: Electrovalent bonds are produced when electrons are transferred from atoms of one element to atoms of another element, producing positive and negative ions. The bond which is formed by the transfer of electrons between the atoms is called electrovalent bond or ionic bond. Electrovalent bonds are only formed between metals and non-metals. Electrovalent bonds are not formed between two non-metals.

In simple words electrovalent bond involves the transference of a certain number of electrons to another dissimilar atom which has a tendency to gain electrons so that both acquire stable inert gas configurations. The electrostatic attraction always tends to decrease the potential energy. Hence, the potential energy of the system is much less than it was before the formation of an ionic bond.

Explanation: An Ionic bond is the bond formed by the complete transfer of valence electron to attain stability.

This type of bonding leads to the formation of two oppositely charged ions – positive ion known as cations and negative ions are known as anions.

The presence of two oppositely charged ions results in a strong attractive force between them. This force is an ionic or electrovalent bond.

Ionic bonds form between atoms with large differences in electronegativity, whereas covalent bonds formed between atoms with smaller differences in electronegativity.

The compound formed by the electrostatic attraction of positive and negative ions is called an ionic compound.

5 0
3 years ago
Please help quickly i have exam
katrin [286]

Answer:

ALL EXCEPT

"O and S" and "F and Cl"

7 0
3 years ago
What would happen if a mixture of benzoic acid and cyclohexanol dissolved in CH2Cl2 is treated with aqueous NaOH solution
vlabodo [156]

Answer:

The salt of benzoic acid would dissolve in the aqueous layer while cyclohexanol would remain in the CH2Cl2 layer.

Explanation:

The pH at which the amino acid exists primarily in its neutral form. hope this helps you :)

5 0
3 years ago
A 25.0 ml solution of .0600 M EDTA was added to a 57.0 ml sample containing an unknown concentration of V3+. All V3+ present for
Rom4ik [11]

Explanation:

Let us assume that the ratio for the given reaction is 1:1.

Therefore, we will calculate the moles of Ga^{3+} as follows.

   Moles of Ga^{3+} solution = molarity × volume (L)

                              = 0.0440 M × 0.014 L

                              = 0.000616 moles

Moles of excess EDTA = 0.000616 moles

Also, the initial moles of EDTA will be calculated as follows.

     Total initial moles of EDTA = 0.0600 M × 0.025 L

                                                 = 0.0015

Therefore, moles of EDTA reacted with V^{3+} will be as follows.

                = 0.0015 - 0.000616

                = 0.00088 moles

Since, we have supposed a 1 : 1 ratio between V^{3+} and EDTA .

So, moles of V^{3+} = 0.00088 moles

Now, we will calculate the molarity of V^{3+} as follows.

       Molarity of V^{3+} solution = \frac{\text{moles}}{\text{volume (L)}}

                             = \frac{0.00088 moles}{0.057 L}

                             = 0.015 M

Thus, we can conclude that the original concentration of the V^{3+} solution is 0.015 M.

4 0
3 years ago
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