What happens to chemical bonds during a chemical reaction?

NaOH + HCl -> Fe + HCl ->

vfiekz [6]

Answer:

This is an oxidation-reduction (redox) reaction:

2 HI + 2 e- → 2 H0 (reduction)

Fe0 - 2 e- → FeII (oxidation)

HCl is an oxidizing agent, Fe is a reducing agent.

Reactants:

Fe

Names: Iron source: wikidata, accessed: 2019-09-07, Fe source: wikidata, accessed: 2019-09-07, Element 26 source: wikidata, accessed: 2019-09-07... show more

HCl – Chlorane source: wikipedia, accessed: 2019-09-27, Hydrogen chloride source: wikipedia, accessed: 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02

Other names: Hydrochloric acid sourc2 2019-09-27source: NIOSH NPG, accessed: 2019-09-02, M source: wikipedia, accessed: 2019-09-27, Uriatic acid source: wikipedia, accessed: 2019-09-27... show more

Appearance: Colorless, transparent liquid, fumes in air if concentrated source: wikipedia, accessed: 2019-09-27; Colorless gas source: wikipedia, accessed: 2019-09-27; Colourless compressed liquefied gas with pungent odour source: ICSC, accessed: 2019-09-04; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.] source: NIOSH NPG, accessed: 2019-09-02

Products:

FeCl2 – Iron(II) chloride source: : 2019-09-27source: ICSC, accessed: 2019-09-04, Iron dichloride source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04

Other names: Ferrous chloride source 2019-09-27source: wikidata, accessed: 2019-09-02source: ICSC, accessed: 2019-09-04, Rokühnite source: wikipedia, accessed: 2019-09-27, [FeCl3] source: wikidata, accessed: 2019-09-02, FeCl3 source: wikidata, accessed: 2019-09-02

Appearance: Tan solid (anhydrous) | Pale green solid (di-tetrahydrate) source: wikipedia, accessed: 2019-09-27; White-to-light-green hygroscopic crystals source: ICSC, accessed: 2019-09-04

H2

Names: Dihydrogen source 2019-09-07, Hydrogen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, H2 source: wikidata, accessed: 2019-09-07... show more

Appearance: Odourless colourless compressed gas source: ICSC, accessed: 2019-09-04

Hope this helps

5 0

3 years ago

The [α] of pure quinine, an antimalarial drug, is −165. If a solution contains 86% quinine and 14% of its enantiomer (ee = 72%),

ratelena [41]

Answer : The [α] for the solution is, -118.8

Explanation :

Enantiomeric excess : It is defined as the difference between the percentage major enantiomer and the percentage minor enantiomer.

Mathematically,

$\%\text{ Enantiomer excess}=\%\text{ Major enantiomer}-\%\text{ Minor enantiomer}$

Given:

% major enantiomer = 86 %

% minor enantiomer = 14 %

Putting values in above equation, we get:

$\%\text{ Enantiomer excess}=86\%-14\%=72\%$

$\text{ Enantiomer excess}=\frac{72}{100}=0.72$

Now we have to calculate the [α] for the solution.

$[\alpha]=\text{Enantiomer excess}\times [\alpha]_{Pure}$

$[\alpha]=0.72\times -165$

$[\alpha]=-118.8$

Thus, the [α] for the solution is, -118.8

4 0

3 years ago

t takes 7.21 ⋅ 10 − 19 J of energy to remove an electron from an iron atom. What is the maximum wavelength of light that can do

loris [4]

Answer:

276 nm

Explanation:

The equation relating the energy (E) and the wavelength (λ) of a wave is

E = (hc)/λ Multiply both sides by λ

Eλ = hc Divide both sides by E

λ = (hc)/E

h = 6.626 × 10⁻³⁴ J·s

c = 2.998 × 10⁸ m·s⁻¹

E = 7.21 × 10⁻¹⁹ J Calculate the wavelength

λ = (6.626 × 10⁻³⁴ × 2.998 × 10⁸)/7.21 × 10⁻¹⁹

λ = 2.76 × 10⁻⁷ m = 276 × 10⁻⁹ m = 276 nm

6 0

3 years ago

someone pls help me with my chemistry test plsss my teacher changes the questions so I can't search them up. its 21 questions so

fredd [130]

Answer:

21) B

22) D

23) B

24) A

25) C

Explanation:

5 0

3 years ago

Suppose you are trying to separate three Proteins using Gel-Filtration chromatography. The sizes of each are given below:

Damm [24]

Answer: The correct answer is Protein B.

Explanation:

Gel-filtration chromatography is a separation technique that is based on the size of the molecules in a compound. It is also known as size-exclusion chromatography in which the eluent (carrier) used is an aqueous solution.

The matrix that is used is a porous material. When the sample is inserted in the column, the smaller particles interact strongly with the matrix than the large ones. Thus, as the eluent is passed through the matrix, larger molecules come out first, and the smallest molecule comes out last.

Given sizes of the proteins:

Protein A: 1200 kDa

Protein B: 2000 kDa

Protein C: 800 kDa

As protein B has the largest size of all the given proteins, it will emerge out first from the column.

Hence, the correct answer is Protein B.

3 0

3 years ago