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3 years ago

What does refluxing a reaction mean in organic chemistry lab?

1 answer:

7 0

Answer: Reflux refers to an experimental method that involves heating a reaction mixture to the boiling point temperature of the reaction solvent and inducing the solvent to recondense back into the reaction flask using a condenser.

Explanation: Hope this helps

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A chemist makes a solution of NaOH for use in an experiment. She dissolves 0.00500 mol NaOH in 1.00 L H2O. The NaOH completely d

anygoal [31]

Answer:

pH = 11.7

Explanation:

Given:

[OH-] = 0.00500 M

To determine:

pH of the solution

Explanation:

pH refers to the H+ ion concentration in a given solution whereas pOH indicates the OH- ion concentration.

pH and pOH are related by the following equation:

$pH + pOH = 14 ------(1)$

Here:

$pH = -log[H+]\\\\pOH = -log[OH-]$

When OH- = 0.00500 M

$pOH = -log(0.00500) = 2.30\\$

Based on equation(1):

$pH = 14 - pOH = 14 -2.30=11.7$

6 0

3 years ago

Using what you know about the periodic table, list some patterns that organize the elements in terms of atomic number, atomic ma

Sindrei [870]

Answer:

yes

Explanation:

yes they're very common.

5 0

3 years ago

What is the most stable monatomic ion formed from lithium?

s344n2d4d5 [400]

Answer: The ion formed by lithium element is $Li^+$

Explanation:

Ions are formed when an atom looses or gains electrons.

If an atom gains electrons, it leads to the formation of negative ions known as anions. For Example: Fluorine gains 1 electron to form $F^-$ ions.

If an atom looses electrons, it leads to the formation of positive ions known as cations. For Example: Sodium looses 1 electron to form $Na^+$ ions.

Lithium is the 3rd element of the periodic table having 3 electrons.

The electronic configuration of lithium element = $1s^22s^1$

This element will loose 1 electron to attain stable electronic configuration and will lead to the formation of $Li^+$ ion.

Hence, the ion formed by lithium element is $Li^+$

3 0

3 years ago

To use the right hand rule, you should point your thumb in the same

Flauer [41]

The Correct Answer is Eletric Current I think

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4 years ago

Yall what do ya think shaped ya feelings bout science classes?

Vadim26 [7]

I was interested in science when I first saw a diagram of Solar system in my sister's geography book. At that time I was in Senior Kindergarten and she was in 6th grade. At first, I was just interested in space, universe and black holes stuff, but then as I started learning more, I realised how amazing other branches of science are too. They are so systematic. What encourages me to learn more are the gaps in science, its mysteries, I wish to uncover them one day, and for that I am preparing myself. When I am in a science class, I try to imagine where can I apply this knowledge in my day to day life, and my teachers are fascinated when I ask them if this principle is responsible for this phenomena. I love it very much. I like Physics the most, but other branches are great too.

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3 years ago