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3 years ago

How many moles of hcl will react when you start with 1 L of a 0.5 M HCl aqueous solution?

1 answer:

6 0

1L of 0.5M HCl contains 0.5mol of HCl which can react.

This can be found by the fact that
molarity is defined as the number of moles of a substance per Liter of solution. That means that 0.5M of HCl can be thought of as 0.5moles of HCl per liter of solution.

In general to find the number of moles of substance in a solution using the molarity all you do is multiply the molarity by the volume of the solution (in liters).

I hope this helps. Let me know if anything is unclear.

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Analysis of the water content of a lake found in the desert showed that it contained 16.6 percent chloride ion, and had a densit

IRISSAK [1]

Answer : The molarity of the chloride ion in the water is, 5.75 M

Explanation :

As we are given that 16.6 % chloride ion that means 16.6 grams of chloride ion present 100 grams of solution.

First we have to calculate the volume of solution.

$\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}$

$\text{Volume of solution}=\frac{100g}{1.23g/mL}=81.3mL$

Now we have to calculate the molarity of chloride ion.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of chloride ion}\times 1000}{\text{Molar mass of chloride ion}\times \text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Molarity}=\frac{16.6g\times 1000}{35.5g/mole\times 81.3mL}=5.75mole/L=5.75M$

Thus, the molarity of the chloride ion in the water is, 5.75 M

8 0

3 years ago

A student was provided with a solid sample made up of a mixture of components. Prior to separation, the student measured 2.895 g

Shtirlitz [24]

Answer:

Component 1, since it has the greatest mass.

Explanation:

Hello,

In this case, considering that the by-mass percent of a substance is computed:

$\% m/m_i=\frac{m_i}{m_{mixture}}*100\%$

In such a way, given the form of the equation one could infer that the higher the mass of the i component, the higher its by-mass percent, it means that the component with the greatest mass will have the highest by-mass percent for the mixture. In such a way, since the component 1 was found to have a mass of 1.12 g, it will have the highest by-mass percent.

Best regards.

7 0

3 years ago

0.103 g of Zn(s) is combined with 50.0 mL HCl in a reaction vessel, the temperature changes from 22.5oC to 23.7oC. What is the Δ

Margarita [4]

Given:

0.103 grams of Zinc (solid)
50 ml of HCl
Density of HCl = 1.0 g/mL
Initial Temperature (Ti) = 22.5 C
Final Temperature (Tf) = 23.7 C

Solve for the mass of HCl:

50 mL * 1.0 g/mL = 50 g

Assume that the Cp for HCl is similar to the Cp of water:

q = mCpdT
= mCp (Tf - Ti)
= 50 g * 4.18 J/gC * (23.7 - 22.5)
q = 250.8 J = H

6 0

4 years ago

True or false applied chemistry does not have a specific goal or application

melisa1 [442]

Answer:

False. The goal of chemistry is to accumulate knowledge. Sometimes true. Biochemistry involves ... Sometimes true. Applied Chemistry is used to attain specific goals ... Applied Chemistry.

Explanation:

I really hope this helped :)

7 0

3 years ago

A 15.0 mL sample of a liquid has a mass of 12.3 g. What is the density of the liquid? A. 0.820g/mL B. 1.22g/mL C. 185g/mL D. 12.

MariettaO [177]

Answer: Option A. 0.820g/mL

Explanation:

Mass = 12.3 g

Volume = 15mL

Density = Mass /volume

Density = 12.3/15 = 0.82g/mL

4 0

3 years ago