Answer:
Explanation:
The weak acid HF is in solution with dissolved NaF; NaF is an ionic compound, so it will dissolve by dissociating its ions; this solution reaction is:
NaF⇒
So, initially there will be these species in solution:
-NaF
-
-
If we add HCl, which is a strong acid, it will dissociate completely (that is the characteristic of a strong acid) in ions H+ and Cl-:
HCl⇒
So, we are finally adding ions and .
We are asked which ion will react with the released by HCl acid. We should think just about the anions (negative ions) because we require an electron donor to create a bond with H+, so it won't be on solution as H+. We just have two anions in solution: and .
If bonded to it would form HCl, but we saw that HCl is a strong acid which always dissociate completely in aqueous solution; so will never bond to . Finally, can bond giving HF as a result; it is possible because HF is a weak acid, and HF can be, in fact, present in an aqueous solution; the ions will be changed to HF and the pH (which depends only on concentration) will not change.
The element is likely to be metal.
The substances that are pure and only consists of atoms are called elements. They are the smallest and the fundamental unit of the compound and cannot be split to form any entity.
<h3>What are metals?</h3>
The metals are the elements that are good conductors of charge, electricity, are opaque, malleable, lustrous and ductile. They have high density and melting points. They differ from the non-metals and metalloids based on their physical and chemical properties.
The metals are more likely to donate and gain electrons to form complexes and can produce transitions. The electron gets excited when the energy is given in the form of heat and electricity and thus when comes to the ground state gives a distinct colouration.
Therefore, the element is likely to be metal.
Learn more about metals here:
brainly.com/question/24911138
Explanation:
- Simple Distillation: its a separation method that can be used when the two or more liquids in the mix have at least 50 degrees of difference between their boiling points.
-Azeotropic distillation: is a technique to break an azeotrope (constant boiling point mixtures), that can't be separated by simple distillation, by adding another component to generate a new azeotrope (between one initial component and the new one added) with lower boiling point.
-Extractive distillation: is a process to separate mixtures with close boiling points by adding a miscible, high boiling or none volatile solvent to increase the relative volatility of the liquids in the mix, this increases the separation factor. It differences from the azeotropic method because it doesn't form an azeotrope.
-Liquid-liquid extraction: is a method to separate compounds based on their relative solubilities in two different immiscible liquids.
After describing all the methods we can conclude that all of them are methods to separate substances based on their physical properties, this is their similarity. The difference between this method is the property it uses to separate (solubility in the case of extraction and boiling point in the case of destinations), the cases in which they bare used (when the liquids difference in boiling points is bigger [simple] or close [attractive and azeotropic]) and the formation of azeotropes (present in azeotropic and absent in extractive).
I hope you find this information useful and interesting! Good luck!
Answer:
E=1.1
Explanation:
let's consider moles of E is X
3(0.20)+5(0.30)+0.10 =2X
2.2=2X
x=1.1
Heparin is an anticoagulant (blood thinner). It is produced by the body to prevent blood clots from forming at the site of an injury or infection.