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rjkz [21]
3 years ago
12

Hydrochloric acid and calcium carbonate react in the same way that baking soda and vinegar do. Write equations for the two react

ions that occur when these compounds react.
2HCl + CaCO3 = CaCl2 + CO2 + H2O
CaCO3 + 2HCl = CaCl2 + H2CO3
Chemistry
1 answer:
neonofarm [45]3 years ago
7 0

Answer:

2HCl + CaCO_3 ---> CaCl_2 + CO_2 + H_2O

CH_3COOH + NaHCO_3 ---> CH_3COONa + CO_2 + H_2O

Explanation:

Hydrocholoric acid is written as HCl

Calcium carbonate is written as CaCO_3

For a balanced equation, 2 moles of Hydrochloric acid reacts with 1 mole of calcium carbonate to give one mole of calcium chloride, 1 mole of carbon dioxide and 1 mole of water respectively.

2HCl + CaCO_3 ---> CaCl_2 + CO_2 + H_2O

Baking soda is written as NaHCO_3

Vinegar is written as CH_3COOH

1 mole of vinegar reacts with 1 mole of baking soda to give 1 mole of sodium acetate, one mole of carbon dioxide and 1 mole of water respectively.

CH_3COOH + NaHCO_3 ---> CH_3COONa + CO_2 + H_2O

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Rzqust [24]
That statement is true.

Reason: If you are familiar with the cell theory, the cell theory states 3 things:

- All living things are made up of cells
- Cells are the basic unit of life
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Any living things are made up of cells- which is why cells are considered the building blocks of life on Earth.


Hope this helps!! :)

6 0
3 years ago
Read 2 more answers
Many important biochemicals are organic acids, such as pyruvic acid ( p K a = 2.50 ) and lactic acid ( p K a = 3.86 ) . The conj
Ivenika [448]

Answer:

Pyruvic acid: conjugate base

Lactic acid: conjugate base

Explanation:

The ratio of conjugate base to conjugate acid can be found using the Henderson-Hasselbalch equation when the pH and pKa are known.

pH = pKa + log([A⁻]/[HA])

The equation can be rearranged to solve for the ratio:

pH - pKa = log([A⁻]/[HA])

[A⁻]/[HA] = 10^(pH-pKa)

Now we can calculate the ratio for the pyruvic acid:

[A⁻]/[HA] = 10^(pH-pKa) = 10^(7.4 - 2.50) = 79433

[A⁻] = 79433[HA]

There is a much higher concentration of the conjugate base.

Similarly for lactic acid:

[A⁻]/[HA] = 10^(pH-pKa) = 10^(7.4 - 3.86) = 3467

[A⁻] = 3467[HA]

For lactic acid the conjugate base also dominates at pH 7.4

6 0
4 years ago
All of the following undergo hybridization except <br><br> A. C<br> B. Si<br> C. Mg<br> D. B
Pavel [41]

Answer:

C: Mg

Explanation:

Hybridization of atomic orbitals is a fundamental concept introduced by Pauling that describes the mixing of orbitals at an atom which adds a definite direction to the Lewis - shared electron pair or electron chemical - bond concept.

Carbon(C) can hybridized on sp, sp2 and sp3 simply because it's valence shell gives room for it.

For silicon(si), when forming covalent bonds with other atoms, it's 3s and 3p orbitals are mixed with each other to form new hybrid orbitals.

Magnesium in itself doesn't hybridized except in magnesium hydrides.

Boron orbitals(B): when boron forms bonds with three other atoms like borazine, they are hybridized to either the sp2 or hybridized to the sp3 which occurs when boron forms bonds with four atoms just as is in metal borohydrides.

7 0
3 years ago
Fecl3 reacts with only one of the two compounds aspirin and salicylic acid with which part of a molecule does fecl3 react
lara [203]
FeCl3 very commonly reacts with phenol groups.

hope this helps!!
8 0
3 years ago
Read 2 more answers
In the presence of CN-, Fe3 forms the complex ion Fe(CN)63-. The equilibrium concentrations of Fe3 and Fe(CN)63- are 8.5 x 10-40
aleksklad [387]

Answer:

Kf = 9.96x10⁴¹

Explanation:

When Fe³⁺ and CN⁻ are in water, complex Fe(CN)₆³⁻ is formed, thus:

Fe³⁺ + 6CN⁻ ⇄ Fe(CN)₆³⁻

Kf is defined as:

Kf = [Fe(CN)₆³⁻] / [Fe³⁺] [CN⁻]⁶

Equilibrium concentration of ions is:

[Fe(CN)₆³⁻] = 1.5x10⁻³M

[Fe³⁺] = 8.5x10⁻⁴⁰

[CN⁻] = [KCN] = 0.11M

Replacing in Kf expression:

Kf = [1.5x10⁻³M] / [8.5x10⁻⁴⁰] [ 0.11M]⁶

<h3>Kf = 9.96x10⁴¹</h3>

5 0
3 years ago
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