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Ksju [112]
3 years ago
12

The role of sodium hydroxide in the synthesis of a chalcone is to

Chemistry
1 answer:
dalvyx [7]3 years ago
5 0

Explanation:

Chemical formula of chalcone is C_{15}H_{12}O and during the preparation of chalcones, a base like sodium hydroxide acts like a catalyst. This catalyst helps in the abstraction of proton from the methyl group acetophenone in order to obtain a negative charge methylene group.

This methylene group then attacks carbonyl carbon of the benzaldehyde.

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Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be
lana66690 [7]

Answer: P_4(l)+5O_2(g)+3H_2O(l)\rightarrow 2H_3PO_4(l)  

Explanation:

We are given two reactions which are the two steps of a mechanism:

P_4(l)+5O_2(g)\rightarrow 2P_2O_5(g)       ......(1)

P_2O_5(g)+3H_2O(l)\rightarrow 2H_3PO_4(l)        .......(2)

To determine the net chemical equation, we will multiply equation 2

P_2O_5(g)+3H_2O(l)\rightarrow 2H_3PO_4(l)\times 2  

2P_2O_5(g)+6H_2O(l)\rightarrow 4H_3PO_4(l) .......(3)

Adding (1) and (3)

P_4(l)+5O_2(g)+3H_2O(l)\rightarrow 4H_3PO_4(l)  

Thus, the net balanced chemical equation is:

P_4(l)+5O_2(g)+3H_2O(l)\rightarrow 4H_3PO_4(l)  

6 0
4 years ago
What is the similarity between pure substances and mixtures?
Firlakuza [10]
Mixtures are made up of 2 or more pure substances. pure substance is just its self and a mixture is multiple substances.
6 0
2 years ago
Read 2 more answers
Which steps are important when designing and conducting a scientific experiment?
Leya [2.2K]

Explanation:

When designing and conducting a scientific experiment then it is necessary to sequentially follows all the steps necessary for the experiment.

Also, it is required to identify independent variables, if any. On the other hand, it is required to address any confounding variables, so that it becomes mentioned the type or number of variables present.

Thus, we can conclude that when designing and conducting a scientific experiment:

  • Identify the independent variable.
  • Address any confounding variables.



4 0
3 years ago
Consider the equilibrium reaction. 4A+B↽−−⇀3C After multiplying the reaction by a factor of 2, what is the new equilibrium equat
ss7ja [257]
8A+2B——> 6C
since you multiply by a factor of 2 you do that to each letter
4*2=8
1*2=2
3*2=6
5 0
3 years ago
We can block light by placing obstacles in its path, but it’s much more difficult to block sound. Why?
vladimir2022 [97]
Sound waves can move through various mediums. Similar to the way we can hear a car horn from outside of a house, the sound waves will, however dampened, still pass through mediums, in this case being the wall of a house. 
6 0
3 years ago
Read 2 more answers
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