Ionic Definition and 268 Threads

Homework Statement http://carlodm.com/images/chem.png The Attempt at a Solution The attempt is in the image. HOW IS THIS WRONG?? I've looked at it for hours now!

I have come to a situation that I can hardly differentiate an ionic from a covalent compounds! Before this confusion I had firstly known that whenever I find a compound with constituents of atoms with a very large difference in electronegativity, then i just conclude that its ionic, or when I...

1. A solution of nickel nitrate is added to a solution of lithium sulfide. (you MUST write as a Net Ionic if appropriate). a. BALANCED EQUATION b. Which substance is being oxidized? 2. none really 3. I don't really have much of an attempt because it doesn't specify in the question...

Ok so I'm doing chemistry 1 at uni and have done my first practical. I haven't much background at all in chemistry as I have taken it as an elective for my BEng(elec). I am finding it rather confusing with so many words to remember and so many links to be made between those words to understand...

Homework Statement Homework Equations The Attempt at a Solution I think Graphite is a Van der Waals' Solid and, er, salt would be an ionic. But I really don't have much of a clue about what the second part is going on about! Thanks! :)

Homework Statement im given an experiment on reactivity series and required to write net ionic equation in the results.. I am kinda stuck in this reaction.. between this 3 metal.. iron, copper, and zinc.. reacting with nitric acid.. Homework Equations the reaction was carried out with...

I have no idea how to write these two reactions as net ionic equations in order to show relevancy to their respective pH: Na2CO3 + HCl (pH of 10.36) I know that it dissociates into OH- ions since it has a very basic pH and NaHSO4 + HCl (pH of 4.18) I also know that this...

Will carbon powder dissolve (ionize) in sulfamic acid? If so, what ionic state?

Write the molecular eqaution and the net ionic equation for each of the following aqueous reactions. If no reaction occurs, write NR after the arrow. A) Na2Co3 + MgBr2---> B)MgSO4 + NaOH----> I can't figure these two out. From the solubility rules, all the compounds are soluble so there...

Homework Statement I need to find net ionic equations for: -Fe(NO3)3 + NH3 -Cr(NO3)3 + NH3 -Cu(NO3)2 + NH3 -AgNO3 + NH3 -Cr(OH)3 + NaOH -Fe(OH)3 +NaOH and a whole bunch of other reactions. I have no problem with writing the balanced equations but I get a little stuck on breaking things...

is that at equilibrium, energy,U=0 from the equation below? U(R) = −(A /R6 )+ (B/R12 ) i nid to differentiate the equation and equate U=0?

Homework Statement For each of the following situations, identify those for which a reaction likely to occur. For those that do occur, white a net ionic equation. a) Chromium dipped into silver nitrate. b) Gold immersed in hydrochloric acid c) Nickel pellets dropped into calcium acetate...

Homework Statement Consider the following equilibria at T = 26 0C, in which all ions are aqueous: Ag+(aq) + Cl-(aq) ----> AgCl(aq) K1 = 2.0E2 AgCl(s) ----> Ag+(aq) + Cl-(aq) K2 = 1.9E-10 Consider the reaction AgCl(s) ----> AgCl(aq) and calculate the concentration of AgCl(aq) in...

Homework Statement Write the formula for magnesium nitrate. 2. The attempt at a solution Okay, so I get that I have to list the cation first and then the anion. I also understand that I have to take the charges into consideration and end up with a neutral compound. My question is why is the...

Hello! If ionic solids are to dissolve, then \Delta H_{solution} has to be negative, (possibly 0? For equilibrium?). This can occur if \Delta H_{hyd} for both the cations and anions is greater than the \Delta H_{LE}. But the textbook also states that a positive \Delta H_{solution} can also...

Hello all, I want to know if decreasing the size of material has effects on its ionic properties? I mean, forexample, we have a system which, in chemistry point of view, has high ionicity, like AlN, ZnO and ... Does the ionic property change if we confine the system in some directions...

I was just wondering becasue every example in my book had oxygen in it, but it didn't say anything about it.

in chemistry, how do i know when there is an ionic bond and when a covalent bond, someone told me when the difference between two atoms electronegativity is more than 2.5 there is an ionic bond, but there are molecules with differences in its atoms electroegativity less than 2.5m such as MgO or NaCl

Homework Statement Identify the group to which X belongs in each ionic compound formula. Enter your response using the group number. a) MgX b)XCl2 c) XF2 Homework Equations The Attempt at a Solution The first one I figured out was group 16. However, the next two I thought...

Homework Statement The distance between the Li+ and Cl- ions in a LiCl is .257 nm. Use this and the molecular mass of LiCl 42.4 g/mol to compute teh density of LiCl.Homework Equations The Attempt at a Solution I am surprisingly having a lot of difficultly with this problem. The LiCl crystal is...

Homework Statement Which of the following compounds are properly classified as ionic? (select all that apply) HOCN SF4 NH4NO3 MgCl2 K2O Li2 NF3 Homework Equations n/a The Attempt at a Solution My initial choices were MgCl2 & K2O ... however, since this was incorrect (it...

Homework Statement NaNO3 + H2O Homework Equations The Attempt at a Solution NaNO3 + H2O -> Na+OH-+NO3-+H2O

Homework Statement 1) You mix a 45.0 mL solution of 0.250 M Al(NO3)3* with a 30.0 mL solution of 0.600 M K2C)3. (a) Give the net ionic equation. (b) How many grams of the precipitate forms? (c) After the reaction, what is the concentration of the excess ions? *All of the numbers in the listed...

1. I need to display the molecular & net ionic equations for the following reactions: 2. NH4NO3 > Na2CO3 NH4NO3 > NaBr NH4NO3 > Na2SO4 Ba(NO3)2 > NaBr Ca(NO3)2 > NaBr Ca(NO3)2 > Na2SO4 3. I don't really have any attempts because I'm completely lost on how to start...

Homework Statement For each of the following situations, identify those for which a reaction is liely to occur. For those that do occur, write a net ionic equation a) Chromium dipped into silver nitrate. b) B) Gold immersed in hydrochloric acid. c) Nickel pellets dropped into calcium...

Just eant to comfirm that the net ionic equation for the reaction in which calcium carbonate is precipitated when aqueous solutions of lithium carbonate and calcium chloride are mixed is: Ca2+ (aq) + CO32- (aq) => CaCO3 (s)

Homework Statement Find the net ionic equation: 2HClO(aq)+Ca(OH)_{2}(aq)\rightarrow 2H_{2}O(l)+Ca(ClO)_{2}(aq)[tex] ...I would show my answer but the forum is not working well right now.

Is there a range of salt in which red blood cells can survive in an isotonic solution. My current understanding is that they can survive in a 0.9% w/v NaCl isotonic solution. But can that number be varied to a range of different amounts of NaCl in which they can survive for any amount of time...

Is this equation a redox reaction? If it is how do I recognize it? I can't seem to complete this. If it is a redox equation, what are the two half reactions becuase there are three reactants? Cl^{-}~+~Ag[(NH_{3})_{2}]^{+}~+~H^{+}==>~?? Thanks.

When trying to find a good hair dryer the other day, I stumbled across something called ionic hairdryers. They seem to be very common; most brands that produce hair dryers seem to have dryers that possesses this mystic quality. I've been trying to find out what this 'ionic' really means, but...

Homework Statement The balanced net ionic equation for precipitation of CaCO3 when aqueous solutions of Na2CO3 and CaCl2 are mixed is _____. Homework Equations Not sure of any The Attempt at a Solution I'm not sure how to get a "net ionic equation." I took chemistry 2 years ago and...

Hi all, We use often concentrations in chemical/biological experiments. It is expressed usually in mili/µ mole/cm3 or mm3 Is there a way to know the number of ions contained in a volume? Is there a way to know the number of ions (or density) on a surface knowing the concentration...

1. Why do anions, such as the chloride anion, increase in size when they achieve a full valence electron shell? This does not make sense to me because there is no new shell that is added. 2. How would you name ionic compunds involving polyatomic ions? My book says that (NH4)2CO3 would be...

Hello! Could someone please drop a link, a book name or an understandable explanation on what ionic conductivity in solids is? I am a 3rd year Applied Physics student and understand the basic concept, but a deeper description would be interesting for me: for example, how is resistance...

This is my reaction Pb(NO3)2(aq) + H2SO4(aq) → PbSO4(s) + HNO3(aq) Pb + (NO3)2(aq) + H2 + SO4(aq) → PbSO4(s) + H + NO3(aq) So far I've done that, and now I'm stuck I see h2 and h and NO3 2 molecules and on the left side i see only one NO3 molecule on the right, can I cross out both or do i...

Homework Statement Pb(NO3)2(aq) + H2SO4(aq) → PbSO3(s) + HNO3(aq) Pb + (NO3)2(aq) + H2 + SO4(aq) → PbSO3(s) + H + NO3(aq) The Attempt at a Solution So far I've done that, and now I'm stuck I see h2 and h can I cross out both or do i have to balance right now? My teacher said you can...

Homework Statement NaCl is an ionic compound, but chlorine and silicon are joined by covalent bonds in SiCl4 A. Use Table 5.4 (page 229 of your text) to determine the electronegativity difference between chlorine and sodium, and between chlorine and silicon. What values did you calculate...

I'm having trouble understanding the CNIE process. It would be very much appreciated if someone could show me how to solve a sample problem.

Does a salt always have an ionic bond in it regardless of whether it's constituents are covalently bonded or not? When an acid reacts with a base does it always create a salt by means of ionic bonding? I hear all salts are soluble in water but bases are not. What about acids. Are acids soluble...

Can anyone help me through this net ionic equation problem? Pb(ClO4)2 (aq) +NaI (aq) -> PbI2 (s) + NaClO4 (aq)

Homework Statement In its resting state, the membrane surrounding a neuron is permeable to potassium ions but not permeable to sodium ions. Thus, positive K ions can flow through the membrane in an attempt to equalize K concentration, but Na ions cannot. This leads to an excess of Na ions...

Homework Statement Current passes through a solution of sodium chloride. In 1.00 second, 2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 x 10^16 Cl- ions arrive at the positive electrode. What is the current passing between the electrodes? Express your answer in...

Current...please help! Homework Statement In an ionic solution, 3.93×10^15 positive ions with charge +2e pass to the right each second while 9.01×101^5 negative ions with charge -e pass to the left. What is the magnitude of current in the solution? Homework Equations I = Ch in Q /...

or are they 1/8 of a sphere at the corners and 1/4 of a sphere at the edge?

Calculate the ionic strength of Ca2+ in a 0.01M CaCO3 solution. equation to use is: u=0.5 sum(Mi)(zi)^2 where M is the concentration and z is the charge of the species my question is when I am calculating the ionic strength of Ca2+, do I have to include CO3^2- that is in that...

1.Chlorine gas is bubbled through an aqueous solution of sodium iodide. 2.Barium hydroxide is used to neutralize sulfuric acid. Ba(OH)2(aq) + H2SO4(aq) -> BaSO4(s) + H2O(aq) ­ Ba(aq) + 2OH(aq) + SO4(aq) -> BaSO4(s) + O(aq) 1.The reason I am having trouble with this equation is...

i am doing revision for my exams aand was wondering which one of these, high temperature, hydrolysis or pH change would break the ionic bond between amino acids. I would go for pH change. I have no reason, it's just instinctively.

which pair of elements is most apt to form an ionic compound with each other? nitrogen and hydrogen or barium and bromine? please explain

elect "True" or "False" to indicate whether or not the stated reaction (or "no reaction") correctly corresponds to the expected observation in each case. Sodium bromide and hydrochloric acid; Na+(aq) + Cl-(aq) --> NaCl(s) Copper(II) sulfate and ammonium carbonate; Cu2+(aq) + CO32-(aq)...

Ionic Strength...help I am taking Biochemistry. However, the prof talked about Inoic Strength in class. This is the example, u = 1/2 (Molarity) (ionic charge )^2 Example... .10M CaCl2 u = 1/2 (.10)(+2)^2 + (.20)(-1) ^2 u = 1/2 ( .40 + .20 ) = .30 I opened my Chemistry...