A. what are substances called whose water solutions conduct electricity? b. why does a salt solution conduct electricity? (2023)

A. If a substance dissociates in water solution on ions, its water solution conduct electricity
B. salt dissociates in water solution on ions,so its water solution conduct electricity
C. sugar does notdissociates in water solution on ions,so its water solution does not conduct electricity

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Chemistry

Answer and Explanation:

(1) Orange juice is a heterogeneous mixture. A heterogeneous mixture contains particles of varying shapes and sizes. They do not have a uniform composition throughout. Orange juice is a heterogeneous mixture as you can see solid particles(pulp).

(b)Tap water is a homogeneous mixture. A homogeneous mixture is where the components are distributed uniformly in a mixture. Tap water has all its components(minerals and gases) dissolved uniformly such that it appears as a single phase.

(2)(a) An aqueous solution of an electrolyte are substances whose water solution conduct electricity.

(b) When an electric current is passed through a salt solution, it dissociates into positive and negative ions which can move freely in the solution. That's how they conduct electricity

(c) Sugar water does not conduct electricity because there are no freely moving ions present.

(3) see attached image

(4) A solution is a homogeneous mixture of a solute dissolved in a solvent. When sugar is dissolved in water, the dissolved sugar is evenly mixed in water such that it cannot be separated from water through settling or filtration method. Whereas when sand is mixed in water, the sand can settle at the bottom after sometimes which can be separated through filtration completely hence proving that its not a solution.

(5) (a) 14-karate gold: solvent- gold solute- copper + silver

(b) corn syrup: solvent- water solute- sugar

(c) carbonated or sparkling water: solvent- water solute-carbondioxide

(6) If you allow a container of sea water to sit in the sun, the liquid(water) will be evaporated, leaving behind salt, which appears in crystal form.

Chemistry

Chemistry

glycoproteins

Explanation:

A positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).

Chemistry

Answer:

Taking into accoun the ideal gas law, The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

Explanation:

In this case, you know:

P= 0.884 atm

V= ?

n= 0.857 moles (where 28 g/mole is the molar mass of N₂, that is, the amount of mass that the substance contains in one mole.)

R=0.082

T= 328 K

Replacing in the ideal gas law:

0.884 atm×V= 0.857 moles× 0.082 ×328 K

Solving:

V= 26.07 L

The volume of a container that contains 24.0 grams of N2 gas at 328K and 0.884 atm is 26.07 L.

Chemistry

Chemistry

Chemistry

Chemistry

Answer: The product formed is potassium chloride.
Explanation:
Precipitation reaction is defined as the chemical reaction in which an insoluble salt is formed when two solutions are mixed containing soluble substances. The insoluble salt settles down at the bottom of the reaction mixture.

The chemical equation for the reaction of potassium phosphate and magnesium chloride follows (look at the picture)

2 moles of aqueous solution of potassium phosphate reacts with 3 moles of aqueous solution of magnesium chloride to produce 1 mole of solid magnesium phosphate and 6 moles of aqueous solution of potassium chloride.

Chemistry

Chemistry

Answer: a. basic
b. basic
c. acidic
d. neutral

Explanation: Acids and bases can be classified in terms of hydrogen ions or hydroxide ions, or in terms of electron pairs. (look at the picture)
Let us note that from the pH scale, a pH of;
0 - 6.9 is acidic
7 is neutral
8 - 14 is basic

But pH= - log [H^+]
pOH = -log [OH^-]
Then;
pH + pOH = 14
Hence;
pH = 14 - pOH

a. [H+] = 6.0 x 10-10M
pH= 9.22 is basic
b. [OH-] = 30 × 10-2M
pH = 13.5 is basic
C. IH+1 = 20× 10-7M
pH = 0.56 is acidic
d. [OH-] = 1.0 x 10-7M
pH = 7 is neutral

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