All categories

3 years ago

Prelaboratory Assignment 7

Chemistry

1 answer:

Monica [59]3 years ago

8 0

Answer:

The net ionic equation that occurs is;

H⁺(aq) + OH⁻(aq) → H₂O(l)

Explanation:

A chemical equation is an equation showing the chemical symbols of the reactants and products that took part in a chemical reaction.
An Ionic equation shows all the ions involved in a chemical reaction.
For example, the ionic equation for the reaction between HCl and NaOH is;

H⁺(aq) Cl⁻(aq) + Na⁺(aq) OH-(aq) → Na⁺(aq) Cl⁻(aq) + H₂O(l)

The net ionic equation, on the other hand, shows only the ions that are directly involved in the reaction and omits the spectator ions.
Spectator ions are the ions that do not change state after the reaction and are not directly involved in the reaction. Na⁺ and Cl⁻ are spectator ions.
Therefore, the net ionic equation is;

You might be interested in

What can you do differently for

drek231 [11]

Answer:

I would say, what helps me is really paying attention in class and asking questions, also making sure you study for upcoming test's and quizzes and completely assingments on time

Explanation:

3 0

3 years ago

Which statement about climate is true?

Y_Kistochka [10]

I believe the answer is B!

6 0

3 years ago

Given that the freezing point depression constant for water is 1.86°c kg/mol, calculate the change in freezing point for a 0.907

melamori03 [73]

Answer : The correct answer for change in freezing point = 1.69 ° C

Freezing point depression :

It is defined as depression in freezing point of solvent when volatile or non volatile solute is added .

SO when any solute is added freezing point of solution is less than freezing point of pure solvent . This depression in freezing point is directly proportional to molal concentration of solute .

It can be expressed as :

ΔTf = Freezing point of pure solvent - freezing point of solution = i* kf * m

Where : ΔTf = change in freezing point (°C)

i = Von't Hoff factor

kf =molal freezing point depression constant of solvent. $\frac{^0 C}{m}$

m = molality of solute (m or $\frac{mol}{Kg}$ )

Given : kf = 1.86 $\frac{^0 C*Kg}{mol}$

m = 0.907 $\frac{mol}{Kg}$ )

Von't Hoff factor for non volatile solute is always = 1 .Since the sugar is non volatile solute , so i = 1

Plugging value in expression :

ΔTf = 1* 1.86 $\frac{^0 C*Kg}{mol}$ * 0.907 $\frac{mol}{Kg}$ )

ΔTf = 1.69 ° C

Hence change in freezing point = 1.69 °C

5 0

3 years ago

This patient has a bone density of 820mg/cm3. What is the volume of a 25g sample?

mamaluj [8]

<u>Answer:</u> The volume of bone for given sample is $30.49cm^3$

<u>Explanation:</u>

To calculate volume of a substance, we use the equation:

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

Density of bone = $820mg/cm^3=0.82g/cm^3$ (Conversion factor: 1 g = 1000 mg)

Mass of bone = 25 g

Putting values in above equation, we get:

$0.82g/cm^3=\frac{25g}{\text{Volume of bone}}\\\\\text{Volume of bone}=30.49cm^3$

Hence, the volume of bone for given sample is $30.49cm^3$

3 0

4 years ago

Other than rain what kinds of precipitation are there?

borishaifa [10]

<span>Other than rain what kinds of precipitation are there, the following includes: snow, hail, sleet. Precipitation refers to any things that falls down brought by a natural phenomenon because of a chemical reactions and settles to the bottom of a solution. The higher the degree of the precipitation, the bigger the area has that source.</span>

7 0

3 years ago

Read 2 more answers