What kind of ions are more prevalent in a basic solution? *

A lab requires 3.50L of a 2.0M solution of HCl. What volume of a 6.0M solution is needed to make this solution?

Alchen [17]

The answer is 1.167L of 6.0M solution.

4 0

3 years ago

Read 2 more answers

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydro

My name is Ann [436]

Answer:

The answer to your question is given below.

Explanation:

The reaction of sulfuric acid and potassium hydroxide is called neutralisation.

Neutralisation is a reaction involving an acid and a base which produces salt and water only.

For the react between sulfuric acid, H2SO4 and potassium hydroxide, KOH, we can predict the products obtained as follow:

H2SO4 + KOH —>

In solution, H2SO4 and KOH will dissociate as follow:

H2SO4(aq) —> 2H^+(aq) + SO4^2-(aq)

KOH(aq) —> K^+(aq) + OH^-(aq)

H2SO4 + KOH —>

2H^+(aq) + SO4^2-(aq) + K^+(aq) + OH^-(aq) —> K^+(aq) + SO4^2-(aq) + 2H^+(aq) + OH^-

H2SO4 + KOH —> K2SO4 + H2O

Now, we can balance the above equation as follow:

H2SO4 + KOH —> K2SO4 + H2O

There are 2 atoms K on right side and 1 atom on the left side. It can be balance by writing 2 in front of ko as shown below:

H2SO4 + 2KOH —> K2SO4 + H2O

There are 2 atoms of H on the right side and a total of 4 atoms on the left side. It can be balance by writing 2 in front of H2O as shown below:

H2SO4 + 2KOH —> K2SO4 + 2H2O

Now,the equation is balanced.

6 0

4 years ago

Which of the following reactions is not spontaneous? Cu (s) + 2HCl (aq) → CuCl2 (aq) + H2 (g) Mg (s) + 2HCl (aq) → MgCl2 (aq) +

grin007 [14]

Answer : The reaction not spontaneous is:

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

Explanation :

The given reactions are the examples of single displacement reactions.

Single displacement reactions : It is defined as the reactions in which most reactive metal displaces the least reactive metal from its chemical reaction. The reactivity of metals is given by the series known as reactivity series.

That means the metals that lie above in the series can replace the metals which lie low in the reactivity series.

For the given options:

Option A :

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

Copper lies low in the series than hydrogen and hence is less reactive. So, it will not displace hydrogen. Thus, this is a non-spontaneous reaction.

Option B :

$Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)$

Magnesium lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option C :

$2Ni(s)+H_2SO_4(aq)\rightarrow Ni_2SO_4(aq)+H_2(g)$

Nickel lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option D :

$2Al(s)+6HBr(aq)\rightarrow 2AlBr_3(aq)+3H_2(g)$

Aluminum lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Option E :

$Zn(s)+2HI(aq)\rightarrow ZnI_2(aq)+H_2(g)$

Zinc lies above in the series than hydrogen and hence is more reactive. So, it will easily displace hydrogen. Thus, this is a spontaneous reaction.

Hence, the reaction not spontaneous is:

$Cu(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2(g)$

8 0

3 years ago

Talc _____. is the hardest known mineral has a Mohs hardness of 1 has a Mohs hardness of 10 is harder than quartz

NARA [144]

Talc is the softest known mineral which is why it has a Mohs hardness of 1. The Mohs Hardness Scale is the most popular way of measuring and testing the hardness of a mineral. The Mohs hardness ranges from 1 (softest) to 10 (hardest). The hardest mineral with a Mohs hardness of 10 is diamond.

Talc is a clay mineral composed of magnesium silicates commonly used in making powder, paint, cosmetics, and many other products.

4 0

3 years ago

Read 2 more answers

The atoms and molecules in a gas are in constant motion. Temperature is a measure of their speed as they move. How are these rel

zmey [24]

The higher the temperature of the gas, the faster the molecules move as they approach evaporating temperature. The lower the temperature of the gas, the slower the molecules move as they approach cooling temperature. The temperature controls how fast the molecules move

4 0

3 years ago