which is covalent or ionic?

Question

1. does sand have a covalent or ionic bond?

2. does baking soda have a covalent or ionic bond?

and how can you tell the difference between these bonds

Answer 1

1. Sand consists of an endless three-dimensional network of Si-O covalent bonds, with each Si connected to four O'sand each O connected to two Si's.

2. Na+ HCO3- has an ionic bond between the Na+ and the HCO3-. But there are covalent bonds between C=O, C-O-H, and C-O(-).

Answer 2

+2

Answer 3

First you need the chemical formula of sand and baking soda.

A common constituent of a lot of sand is silicon dioxide (SiO2), for more information see:

http://en.wikipedia.org/wiki/Silica

HOWEVER ... the bright white sand found on tropical beaches is limestone (CaCO3), for more information see:

http://en.wikipedia.org/wiki/Sand


To determine if a bond is ionic or covalent, you need to compare the electronegativities of the elements involved. For a table of electronegativities, see:

http://en.wikipedia.org/wiki/Electronegativity


If the difference in electronegativity is less than 1.2, the bond is covalent, if the difference is larger than 1.8, the bond is ionic, between 1.2 and 1.8 the bond is polar covalent. For more information, see:

http://www.cartage.org.lb/en/themes/Sciences/Chemistry/Inorganicchemistry/Informationbonding/CovalentElectrons/UsingElectronegativity/UsingElectronegativity.htm


For silicon dioxide sand, electronegativities are:

oxygen O = 3.44
silicon Si = 1.90

3.44 - 1.90 = 1.54 difference

Since the difference is less than 1.8, you have a covalent bond. (You had only covalent or ionic to pick from for this question.) This breakpoint of 1.8 is more of a guideline, with other references varying from 1.7 to 1.9 as the breakpoint.


For limestone sand, calcium carbonate, things are more complicated. Calcium is a metal, and CO3 is the carbonate ion with -2 charge. The bonds within carbonate are covalent, but the bond between calcium and carbonate is ionic.

When the anion has more than one element, chemistry texts forget about calculating differences in electronegativity, and just give a rule instead:

"A metal plus a polyatomic ion yields an ionic compound."


Baking soda is sodium bicarbonate, NaHCO3. For more information, see:

http://en.wikipedia.org/wiki/Baking_soda


Again, the bonds within the bicarbonate anion are covalent, and the bond between sodium and bicarbonate is ionic. In this case, just use the rule

"A metal plus a polyatomic ion yields an ionic compound."

Answer 4

Covalent Bonds-Covalent bonding is a form of chemical bonding between 2 non metallic atoms it extremely is characterised with assistance from the sharing of pairs of electrons between atoms and different covalent bonds. A covalent bond is formed between 2 non-metals which have similar electronegativities. Neither atom is "sturdy" sufficient to entice electrons from the different. For stabilization, they share their electrons from outer molecular orbit with others Ionic Bonds-Ionic bond, also prevalent as electrovalent bond is a form of bond formed from the electrostatic appeal between oppositely charged ions in a chemical compound. those sorts of bonds ensue pretty between a metallic and a non metallic atom. An ionic bond is formed between a metallic and a non-metallic. Non-metals(-ve ion) are "better" than the metallic(+ve ion) and ought to get electrons very really from the metallic. those 2 opposite ions entice one yet another and kind the ionic bond. EG: Covalent: Methane (CH4), Hydro Chloric acid (HCL), which factors are all nonmetals Ionic: Sodium chloride (NaCl), Sulphuric Acid (H2SO4 ) and so on.

Answer 5

1. Sand consists of an endless three-dimensional network of Si-O covalent bonds, with each Si connected to four O'sand each O connected to two Si's.

2. Na+ HCO3- has an ionic bond between the Na+ and the HCO3-. But there are covalent bonds between C=O, C-O-H, and C-O(-).

hopr this may help u...............

Answer 6

Covalent bonds usually involves molecular compounds-- nonmetals and nonmetals linked to together and thus sharing electrons.

Ionic bonds involves metals and nonmetals attracted at their poles to each other. no electrons are shared either one gains or the other loss.

Hope this helps. The clues are within lol

Answer 7

i don't think you should be asking homework questions on yahooo, the responses might not be correct...try looking in your textbook