All categories

3 years ago

What does 2 in the chemical formula CaCl2 mean?

Chemistry

1 answer:

liq [111]3 years ago

8 0

Answer:

The answer is

Explanation:

Calcium chloride is created from the ionic bonds that form between calcium cations and chloride anions. Calcium ions have a charge of +2, while chloride ions have a charge of -1. Calcium chloride salts can also form crystals based on these same ionic properties.

Hope this helps.

Please mark my answer as brainliest?

You might be interested in

Give an example of how plants compete with each other.

ICE Princess25 [194]

Answer:

Just as humans and animals compete to win a prize or gain an advantage, there is also competition among plants. This competition is both among its own species, as well as against other types of plants and even animals. Plants seek the rewards of nutrients, water, sunlight, and territory necessary for survival.

7 0

3 years ago

Which two mantle hot spots are located at mid-ocean ridges?

Darya [45]

Answer:

This region of thick, hot crust and mantle extends 1,300 kilometers north and south of the Iceland hotspot and some 1,000 kilometers north and south of the Azores hotspot. Together, the two hotspots appear to be feeding a huge supply of magma to nearly the entire northern segment of the Mid-Atlantic Ridge.

Explanation:

please give me a heart

7 0

3 years ago

Calculate the ph of the resulting solution if 29.0 ml of 0.290 m hcl(aq) is added to

Mama L [17]

We have the given reaction as;

$HCl_{(aq)} + NaOH_{(aq)}$ ----> $NaCl_{(aq)} + H_{2}O_{(l)}$ 

Answer A) The pH will be 12.36,

We have to convert the concentrations of HCl and NaOH into moles,

So we have, n(HCl) = (0.0290 L) X (0.290 mol/L) = 8.41X $10^{-3}$ moles 

and for NaOH we have, n(NaOH) = (0.0390 L)(0.290 mol/L) = 1.13X $10^{-2}$ moles

Now, it seems NaOH is in excess, so amount remaining will be;

1.13 X $10^{-2}$ - 8.41 X $10^{-3}$ = 2.89 X $10^{-3}$ moles

Now, the total volume will become as = 0.0390 + 0.0290 = 0.068 L 

So, the concentration of [ $OH^{-}$ ] = 2.89×10ˉ³ mol / 0.068 L = 4.25 X $10^{-2}$ M

pOH = - log [ $OH^{-}$ ] = -log (4.25× $10^{-2}$ ) = 1.37

Hence, pH = 14 - pOH = 14 - 1.37 = 12.6

So the pH of the solution will be 12.6 which is basic in nature. 

Answer B) The pH will be 1.68

Now, for the given concentration we need to find moles for HCl and NaOH also;

n(HCl) = (0.0290 L)(0.290 mol/L) = 8.41 X $10^{-3}$ mol 

n(NaOH) = (0.0190 L)(0.390 mol/L) = 7.41 X $10^{-3}$ mol 

here we can see, HCl is in excess amount so the remaining will be;

8.41X $10^{-3}$ - 7.41 X $10^{-3}$ = 1.0 X $10^{-3}$ mol

Here, the total volume will be = 0.0290 + 0.0190 = 0.0480 L

So the concentration of [HCl] = 1.0 X $10^{-3}$ mol / 0.0480 L = 2.08 X $10^{-2}$ M

Which is = [H⁺] 

So, the pH = - log [ $H^{+}$ ] = -log(2.08X $10^{-2}$ ) = 1.68

Hence, the pH will be 1.63 which is more acidic in nature.

6 0

3 years ago

Read 2 more answers

Which of the following aqueous solutions should demonstrate the most non-ideal behavior? A. 0.1 M NaI B. 0.2 M CuSO4 C. 0.5 M KB

Maslowich

Answer:

D. 2.0 M CuCl2

Explanation:

The ionic strength of a solution shows the concentration of its ions in that given solution of the compound. Dissolved ionic compounds always dissociate into ions. The total amount of ions in solution will definitely affect the properties of the solution. The concept of ionic strength was first introduced by Lewis and Randall in 1921 while describing the activity coefficients of strong electrolytes.

The ionic strength of CuCl2 is 6M as shown:

ionic strength = 0.5*[(+2)^2*2M + (1-)^2*4M] = 6 M

The higher the ionic strength of a solution, the greater its non ideal behavior.

CuCl2 shows the greatest ionic strength hence the greatest non ideal behavior.

6 0

3 years ago

When elements and compounds that are dissolved in water leave a solution, what is the result?

marusya05 [52]

The result is an aqueous solution

3 0

4 years ago

Read 2 more answers