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Veronika [31]
3 years ago
7

What is the main reason that it takes 2 to 3 minutes for the reaction to occur between sucrose and sulfuric acid in the dehydrat

ion of sucrose?
Chemistry
2 answers:
soldier1979 [14.2K]3 years ago
5 0

 There is a time delay of almost two to three minutes before the reaction proceeds because of the following processes:

<span>1)    </span><span> The acid starts to go yellow as the dehydration begins.</span>

<span>2)    </span><span> The rate of dehydration then accelerates as the acid heats up because the reaction is exothermic/chemical (releases energy by light or heat).  As the sugar molecules are stripped of water, the heat generated turns the water into steam which then expands the remaining carbon into a porous, smoking, black column.</span>

<span>3)    </span>This expands out of the reaction vessel, producing a choking acrid vapor and the smell of burned sugar.

<span> At this stage, sulfuric acid is highly corrosive and will burn skin so one must avoid contact with it. </span>

BARSIC [14]3 years ago
4 0
The are different reasons and these are the following:
1) The acid starts to go yellow as the dehydration begins.
2)The rate of dehydration then accelerates as the acid heats up .
3)This expands out of the reaction vessel.
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Lyrx [107]

Answer:

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3 0
3 years ago
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What is the molarity of a solution made with 400 grams of copper II chloride in 3.5 liters of water?
Leni [432]

Answer:

0.85M

Explanation:

Given parameters:

Mass of CuCl₂  = 400g

Volume of water  = 3.5L

Unknown:

Molarity of the solution = ?

Solution:

Molarity is one of the ways of expressing the concentrations of a solution. It is defined as the number of moles per unit volume of a solvent.

          Molarity  = \frac{number of moles}{volume}

To find the number of moles of CuCl₂;

    Number of moles  = \frac{mass}{molar mass}

  Molar mass of CuCl₂ = 63.6 + 2(35.5)  = 134.6g/mol

   Number of moles  = \frac{400}{134.6}   = 2.97moles

      Molarity  = \frac{2.97}{3.5}    = 0.85M

4 0
3 years ago
How many molecules of XeF6 are formed from 12.9 L of F2 (at 298 K and 2.6 atm) according to 11) the following reaction? Assume t
ddd [48]

Answer:

#Molecules XeF₆ = 2.75 x 10²³ molecules XeF₆.

Explanation:

Given … Excess Xe + 12.9L F₂ @298K & 2.6Atm => ? molecules XeF₆

1. Convert 12.9L 298K & 2.6Atm to STP conditions so 22.4L/mole can be used to determine moles of F₂ used.

=> V(F₂ @ STP) = 12.6L(273K/298K)(2.6Atm/1.0Atm) = 30.7L F₂ @ STP

2. Calculate moles of F₂ used

=> moles F₂ = 30.7L/22.4L/mole = 1.372 mole F₂ used

3. Calculate moles of XeF₆ produced from reaction ratios …

Xe + 3F₂ => XeF₆ => moles of XeF₆ = ⅓(moles F₂) = ⅓(1.372) moles XeF₆ = 0.4572 mole XeF₆

4. Calculate number molecules XeF₆ by multiplying by Avogadro’s Number  (6.02 x 10²³ molecules/mole)

=> #Molecules XeF₆ = 0.4572mole(6.02 x 10²³ molecules/mole)

                                  = 2.75 x 10²³ molecules XeF₆.

8 0
3 years ago
How to balance a chemical equations
nadezda [96]
Count the atoms of each element in the reactants and the products.
Use coefficients; place them in front of the compounds as needed.
8 0
3 years ago
Match each scientist with thr contribution he made to the arrangement of the elements in the periodic table​
Kobotan [32]

Answer:

Dmitri Mendeleev

used patterns to predict undiscovered

elements

Johann Wolfgang Dobereiner

created groups of three elements,

each based on similar properties

John Newlands

arranged elements according to their

atomic mass

Antoine Lavoisier,

divided elements into four categories

✓

6 0
4 years ago
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