How many grams of alcl3 are required to make a 2.25m solution in 30.0 g of water?

Solution:

Washing Clothes & Dissolving Sugar

Clarification:

Consider each scenario:

1) For washing clothes, water is essential; without it, washing is ineffective.

2) Connecting brake pedals to brake pads requires solids, not liquids.

3) To deodorize a space, one would likely reach for an aerosol spray, which is a gas.

4) Sculpting involves solid tools and a solid medium.

5) Dissolving sugar necessitates a liquid to be effective!

6) While one might assert that paint is a liquid, it still might not fit the category; I would categorize this application as solid.

7) Gears employed in machinery are solid components!

Answer:

                    Benzoyl Chloride

Explanation:

                     Friedel-Craft Acylation is a reaction used to incorporate electrophiles (especially carbonyl groups) into the double bonds of aromatic compounds.

This scenario involves synthesizing benzophenone using benzene and benzoyl chloride.

Mechanism:

Step 1: Initially, benzoyl chloride reacts with a Lewis acid to create an electrophile known as oxo(phenyl)methylium.

Step 2: The second stage involves benzene participating in an electrophilic substitution reaction, where the electrophile is added.

Step 3: Finally, the aromatic nature of benzene is restored by releasing a proton.

The concentration of the HCl solution can be determined as follows:

The reaction equation is written as

NaOH + HCl = NaCl + H2O

Next, the moles of NaOH are calculated: moles = molarity x volume /1000

= 5 x 2/1000 = 0.01 moles

Using the mole ratio of NaOH to HCl, which is 1:1, the moles of HCl is also equal to 0.01 moles

The concentration is given by: concentration = moles/volume x 1000

= 0.01/10 x 1000 = 1M

Response:

a. The return of the process fluid after it has been cooled, condensed, or heated in a distillation column or packing.

b. should remain stable at elevated temperatures

   should not generate additional by-products

   should be chemically inert

c. expressed as a range

d. determined by conducting a series of measurements

e. impurities cause substances to melt at lower temperatures.

Explanation:

a. In a reflux system, the condensate is returned to the initial flask or boiler. This keeps the process fluid at a constant temperature without needing more fuel while increasing the molar fraction of the distillate (which enhances product purity).

b. A solvent needs to be stable and should not participate in side reactions that produce unwanted by-products, ideally remaining inert at elevated temperatures.

c. It is advisable to report melting points as a range since various factors influence the melting point in experimental setups.

d. Melting points can be ascertained through a series of graphical measurements.

e. Impurities reduce the melting point of substances.

The right answer is 2.