How can solutions conduct electricity?

QUESTION POSTED AT 12/02/2020 - 04:33 PM

Answered by admin AT 12/02/2020 - 04:33 PM

When a solution conducts electricity, the charge is carried by ions moving through the solution. Ions are atoms or small groups of atoms that have anelectrical charge. Some ions have a negative charge and some have a positive charge. Pure water contains very few ions, so it does not conduct electricity very well.

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Related questions

What is the ph of a neutral solution at 25°c?

Answer:

pH = 7.00

Explanation:

In water at 25 °C,

K_{w} = [\text{H}_{3}\text{O}^{+}][\text{OH}^{-}] = 1.01 \times 10^{-14}\\

The solution is neutral, so [\text{H}_{3}\text{O}^{+}] = [\text{OH}^{-}]\\

[\text{H}_{3}\text{O}^{+}]^{2} = 1.01 \times 10^{-14}\\

[\text{H}_{3}\text{O}^{+}] = \sqrt{1.01 \times 10^{-14}} = 1.00 \times 10^{-7}

To get the pH, you take the negative logarithm of the hydronium ion concentration.

\text{pH} = -\log{( 1.00 \times 10^{-7})} = 7.00\\

ANSWERED AT 28/02/2020 - 05:03 PM


QUESTION POSTED AT 28/02/2020 - 05:03 PM

What is the molarity of a solution of kno3 (molecular mass = 101 that contains 404 grams of kno3 in 2.00 liters of solution? a 1.00 b 2.00 c 0.500 d 4.00?

(1 mol KNO3/ 101 g KNO3)(404 g KNO3)= 4 moles
D

ANSWERED AT 28/02/2020 - 04:37 PM


QUESTION POSTED AT 28/02/2020 - 04:37 PM

If you have 5.55g of hcl dissolved into a 500 ml aqueous solution, what is the ph of the solution

Salts are composed of positive and negative ions packed closely together in a crystal lattice. The crystal is held together by the ionic forces among oppositely charged particles in the solid. When a crystal of a salt is placed in water, the polar water molecules arrange their dipoles around the ions of the crystal in such a way as to attract the ions. For example, a positive ion at a corner of the crystal will be surrounded by a group of water molecules aiming the negative end of their dipoles at the positive ion. If the forces of attraction of the water molecules for the positive ion are larger than the ionic forces holding the ion in the crystal, then the ion will leave the crystal and enter solution. See Figure 15.2
8. Carbon dioxide is somewhat soluble in water, especially if pressurized (otherwise, the soda you may be drinking while studying Chemistry would be “flat”). Carbon dioxide’s solubility in water is approximately 1.5 g/L at 25°C under a pressure of approximately 1 atm. Although the carbon dioxide molecule overall is non-polar, that is because the two individual C–O bond dipoles cancel each other due to the linearity of the molecule. However these bond dipoles are able to interact with water, making CO2 more soluble in water than non-polar molecules such as O2 or N2 that do not possess individual bond dipoles.

ANSWERED AT 28/02/2020 - 04:34 PM


QUESTION POSTED AT 28/02/2020 - 04:34 PM

If 0.5 gramd of hcl is dissolved in 500 ml of solution what is the ph

Salts are composed of positive and negative ions packed closely together in a crystal lattice. The crystal is held together by the ionic forces among oppositely charged particles in the solid. When a crystal of a salt is placed in water, the polar water molecules arrange their dipoles around the ions of the crystal in such a way as to attract the ions. For example, a positive ion at a corner of the crystal will be surrounded by a group of water molecules aiming the negative end of their dipoles at the positive ion. If the forces of attraction of the water molecules for the positive ion are larger than the ionic forces holding the ion in the crystal, then the ion will leave the crystal and enter solution. See Figure 15.2
8. Carbon dioxide is somewhat soluble in water, especially if pressurized (otherwise, the soda you may be drinking while studying Chemistry would be “flat”). Carbon dioxide’s solubility in water is approximately 1.5 g/L at 25°C under a pressure of approximately 1 atm. Although the carbon dioxide molecule overall is non-polar, that is because the two individual C–O bond dipoles cancel each other due to the linearity of the molecule. However these bond dipoles are able to interact with water, making CO2 more soluble in water than non-polar molecules such as O2 or N2 that do not possess individual bond dipoles.

ANSWERED AT 28/02/2020 - 04:34 PM


QUESTION POSTED AT 28/02/2020 - 04:34 PM

All of the following are conductors of electricity except

Rubber it's not a conductor

ANSWERED AT 28/02/2020 - 03:25 PM


QUESTION POSTED AT 28/02/2020 - 03:25 PM

All of the following are conductors of electricity except

What are the choices?

ANSWERED AT 28/02/2020 - 03:24 PM


QUESTION POSTED AT 28/02/2020 - 03:24 PM

What is an example of where energy transfer by conduction is a curringNOW ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

If you're feeling cold and you cuddle someone you'd feel better because the heat is transferred from their body to yours

ANSWERED AT 28/02/2020 - 02:42 PM


QUESTION POSTED AT 28/02/2020 - 02:42 PM

A ______ is a machine that converts mechanical energy to electrical energy. A. transmitter B. pulverizer C. generator

C.generator is the answer

ANSWERED AT 28/02/2020 - 12:47 PM


QUESTION POSTED AT 28/02/2020 - 12:47 PM

Which describes an alkaline solution? pH less than 7 pH equal to 7 basic acidic

Answer:

  • The correct answer is C.
  • Basic

Explanation:

  • The pH scale is 0-14. The values from 0-6 show acidic properties while at 7 pH, it act as neutral while from 8-14 shows basic properties.

pH less than 7

pH less than 7 describe the acidic solution

pH equal to 7

pH equal to 7 describe that solution is neither acidic nor basic. It is neutral

basic

Basic solution describe the alkaline solution, so it is correct one. The alkaline solution has same range as basic solution

acidic

Acids describe the acidic solution , not a alkaline solution

ANSWERED AT 28/02/2020 - 12:08 PM


QUESTION POSTED AT 28/02/2020 - 12:08 PM

5. In this lab, you continued to add Reagent D to each solution until it turned blue. The purpose was to remove the oxygen to measure how much was left. The more drops you had to add to acquire the blue color, the more oxygen was present in the tube. In which phase(s) did the solution turn blue before you added Reagent D? What do you think that means? NO FALSE ANSWERS

A solution is turning blue means, it is turning it's behavior to Basic from Acidic. Reagent D must be a Basic component so it is increasing the pH of the solution. As reaction does not depend on the phase of the component, it could be anything i.e., Solid, Liquid or gas.

Hope this helps!

ANSWERED AT 28/02/2020 - 11:42 AM


QUESTION POSTED AT 28/02/2020 - 11:42 AM

How fast a reactant is used up to how fast a product is formed is _____. A.)the equilibrium B.)the rate of reaction C.)solution concentration D.)the catalyst

Answer: Option (B) is the correct answer.

Explanation:

The rate of a reaction is defined as how rapidly the reactants convert into products.

There are various factors which can help in increasing the rate of a reaction like addition of a catalyst, temperature, change in concentration etc.

Thus, we can conclude that out of the given options how fast a reactant is used up to how fast a product is formed is the rate of reaction.

ANSWERED AT 28/02/2020 - 11:32 AM


QUESTION POSTED AT 28/02/2020 - 11:32 AM

Which of the following would increase the conductivity of a connecting wire? (More than one answer). A) increase the diameter B) increase the length of the wire C) decrease the temperature o the wire D) switch from steel wire to gold wire

All but length I suppose. Diameter would definitely increase the conductivity of a wire, that's why jumper cables are so big, to conduct very large amounts of electricity. Also decreasing temperature allows for a faster flow of electrons causing better conductivity. Finally, Gold is very, very conductive and would be used in wires everywhere if it weren't so expensive(that's why copper is used a lot instead) also gold is quite delicatewouldn't want to bend it back and forth a lot like most wires but simply put, yes. Gold would also very much up the conductivity.

ANSWERED AT 28/02/2020 - 11:29 AM


QUESTION POSTED AT 28/02/2020 - 11:29 AM

The elements which make up water can only be separated by chemical means. That means water is __________. a. a mixture b. an element c. a solution d. a compound

Water is a compound because it is made up of two elements.

ANSWERED AT 28/02/2020 - 11:20 AM


QUESTION POSTED AT 28/02/2020 - 11:20 AM

The requirements for one type of atom to substitute for another in a solid solution are:

Liquid gas solid and the gas

ANSWERED AT 28/02/2020 - 11:12 AM


QUESTION POSTED AT 28/02/2020 - 11:12 AM

6 examples of mixtures and solutions

Salt water
chocolate milk are 2

ANSWERED AT 28/02/2020 - 11:11 AM


QUESTION POSTED AT 28/02/2020 - 11:11 AM

Calculate the molar concentration of an aqueous solution of NH3 at 10.9%w (d = 950 g L-1).

Molar concentration has units of moles of solute per liter of solution. Given the percent by mass and the density of the solution, we ca easily convert the concentration into molarity as  follows:

10.9 g NH3 / 100 g solution ( 950 g / L ) ( 1 mol / 17.04 g ) = 6.08 mol NH3 / L solution 

ANSWERED AT 28/02/2020 - 11:01 AM


QUESTION POSTED AT 28/02/2020 - 11:01 AM

The following two experiments are carried out with anhydrous potassium chloride and observations X and Y are made at the end of each experiment. Concentrated sulfuric acid is added to the potassium chloride and the fumes produced are bubbled into aqueous potassium iodide solution - observation X. The potassium chloride is dissolved in aqueous ammonia and this is then added to aqueous silver nitrate - observation Y. What are the observations X and Y?

Answer:

Observation X: The aqueous potassium iodide solution becomes yellow in color

Observation Y: A clear, colorless solution is observed.

Explanation:

Experiment 1

When Concentrated sulfuric acid is added to potassium chloride, hydrogen chloride gas is produced:

H₂SO₄ + 2KCl ⇒ 2HCl (g) + K₂SO₄

When the HCl gas is bubbled into aqueous potassium iodide, a redox reaction takes place at room temperature when energy is provided in the form of light:

4H⁺ + 4I⁻ + O₂ ⇒ 2I₂ + 2H₂O

The iodine causes the solution to become yellow in color (or darker yellow/brown at high concentrations of iodine).

Experiment 2:

When potassium chloride in aqueous ammonia is added to aqueous silver nitrate, the following net reaction occurs:

Ag⁺ + 2NH₃ ⇒ [Ag(NH₃)₂]⁺

The silver reacts with ammonia rather than chloride as ammonia is a better ligand in this case. The ammonia complex is soluble in water.

Thus, a clear, colorless solution will be observed.

ANSWERED AT 28/02/2020 - 10:48 AM


QUESTION POSTED AT 28/02/2020 - 10:48 AM

Please determine the concentration of fe in the original solution

You need to give us the rest of the problem if you want us he answer it

ANSWERED AT 28/02/2020 - 07:57 AM


QUESTION POSTED AT 28/02/2020 - 07:57 AM

What is the molarity of a HCl solution that contains 8.53 g of HCl in 372 mL of solution?

Answer:

M = 0.629 M

Explanation:

To calculate the molarity of any solution, you need to use the following expression:

M = n/V (1)

Where:

M: Molarity or concentration of solution (mol/L or M)

n: moles of solute (moles)

V: Volume of solution (In Liters)

But in order to use the above expression, we need to calculate the moles of the HCl, which is calculate with the following expression:

n = m/MM (2)

Where:

m: mass of the HCl (g)

MM: molar mass of HCl (g/mol)

The reported molar mass of HCl is 36.46 g/mol.

Calculating first the moles, using (2) we have:

n = 8.53 / 36.46 = 0.234 moles

Now that we have the moles, we can calculate the molarity, but first we need to pass the volume from mL to Liter:

V = 372 / 1000 = 0.372 L

Finally, let's calculate the molarity using (1) and the value of the obtained moles:

M = 0.234 / 0.372

M = 0.629 M

And this is the molarity of the HCl solution

ANSWERED AT 28/02/2020 - 07:08 AM


QUESTION POSTED AT 28/02/2020 - 07:08 AM

How many grams of Lead(II) nitrate are present in 150.0 mL of an Lead(II) nitrate solution that is 0.07268 M?

Hey...
Use the molarity formula
M=moles/L and then convert to grams

0.07268*0.15=moles
0.010902 mol
Pb(NO3)2
1 mole=331.22g
0.010902 moles=

3.61 g


ANSWERED AT 28/02/2020 - 07:03 AM


QUESTION POSTED AT 28/02/2020 - 07:03 AM

Calculate the Molarity (M, moles solute / Liter of solution) of a solution that is made by dissolving 3.456 mmoles of Barium perchlorate in enough water to form a 432.1 mL solution.

Since Molarity is moles per Liter, you will first need to convert the mL into L, which makes it 0.4321L. Next divide: moles on top, Liters on the bottom.
3.456 moles / .4321L = 7.998 M

ANSWERED AT 28/02/2020 - 06:37 AM


QUESTION POSTED AT 28/02/2020 - 06:37 AM

PH is the a measure of the 1) concentration of hydrogen ions in solution 2) concentration of compounds in solution 3) concentration of OH- in solution

The correct answer is:

1) Concentration of hydrogen ions in solution

- I can verify this is correct because I took the test.

ANSWERED AT 28/02/2020 - 04:27 AM


QUESTION POSTED AT 28/02/2020 - 04:27 AM