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Elza [17]
3 years ago
9

What are the coefficients for the following chemical reaction?

Chemistry
1 answer:
Advocard [28]3 years ago
4 0

Explanation:

A and D. the answer is a and d

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Muriatic acid, an industrial grade of concentrated HCl, is used to clean masonry and cement. Its concentration is 11.7 M. For ro
Nata [24]

Answer:

\boxed{\text{199 mL}}

Explanation:

1. Calculate the moles of HCl  

n = \text{25.4 g} \times \dfrac{\text{1 mol}}{\text{36.46 g}} = \text{0.6967 mol}

2. Calculate the volume of dilute HCl

\begin{array}{rcl}\text{Molar concentration}& =& \dfrac{\text{moles}}{\text{litres}}\\\\3.50 & = & \dfrac{0.6967}{V}\\\\3.50V & = & 0.6967\\\\V & = & \dfrac{0.6967}{3.50}\\\\V & = & \text{0.199 L} =\textbf{199 mL}\end{array}\\\text{The volume of muriatic acid needed is }\boxed{\textbf{199 mL}}

3 0
3 years ago
What happened to the limewater in<br> the experiment? What does this<br> prove?
tensa zangetsu [6.8K]

Explanation:

In the reaction above, we clearly see that a chemical reaction took place but what kind of reaction you might ask?

Looks like it is Thermal decomposition of copper carbonate because decomposition reaction takes place due to the added heat. Decomposition in simple terms in chemical breakdown and here this result is obtained by adding heat.

1) What happened to the lime water?

Although not pictured above, but my assumption is that lime water turned milky or turbid because when CO2 comes in presence of limewater they react to form a percipitate of Calcium carbonate which is the milky color that you get.

2) What does this prove?

- My understanding would be that it proves that CO2 was formed, and that most metal carbonates undergo thermal decomposition into metal oxide and carbon dioxide, and also that a reaction took place since new products were made.

3 0
3 years ago
How would you separate the following ions by selective precipitation Ag + , Pb 2+, Cu 2+.​
Lemur [1.5K]

Answer:

we cannot vduurggruuriirru**

4 0
3 years ago
What symbol would represent a chlorine ion with a stable arrangement of eight valence electrons?
Sonja [21]
Cl-
(The - needs to be at the top by the way)
This shows it has gained an electron to form a stable ion which gives it a negative charge (as there are now more electrons then protons)

:)
7 0
3 years ago
Read 2 more answers
How much water must be added to 424 mL of 0.189 M HCl to produce a 0.140 M solution?
Mama L [17]

Answer:

Volume of water added = 148.4 mL

Explanation:

Given data:

Initial volume = 424 mL

Initial molarity = 0.189 M

Final molarity = 0.140 M

Volume of water added = ?

Solution:

Formula:

M₁V₁  =   M₂V₂

0.189 M×424 mL = 0.140 M×V₂

V₂ = 0.189 M×424 mL /0.140 M

V₂ = 80.136 M.mL / 0.140 M

V₂ = 572.4 mL

Final volume of solution is  572.4 mL.

Volume of water added = Final volume - initial volume

Volume of water added = 572.4 mL - 424 mL

Volume of water added = 148.4 mL

7 0
3 years ago
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