On the basis of the general solubility rules given in the table belo.pdf

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must the number of people at a party who do not know an odd number of other people be even? Solution In a graph theory, know that “the number of vertices of odd degree is even”. By applying the above principle to the graph with each person as a vertex and an edge between two people who do not know each other. Then yes. it must the number of people at a party who do not know an odd number of other people be even.

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On the basis of the general solubility rules given in the table below, predict which of the
following substances are likely to be soluble in water. (Select all that apply.)
zinc chloride
lead(II) sulfate
magnesium carbonate
ammonium carbonate Simple Rules for the Solubility of Salts in Water 1. Most nitrate (NO) salts
are soluble. 2. Most salts containing the alkali metal ions (Li", Na, K, Cst, Rb*) and the
ammonium ion (NH,) are soluble. 3. Most chloride, bromide, and iodide salts are soluble.
Notable exceptions are salts contain- ing the ions Ag", Pb", and Hgr. 4. Most sulfate salts are
soluble. Notable exceptions are BaSO4. PbSO4, Hg,SO, and CaSO4. 5. Most hydroxide salts are
only slightly soluble. The important soluble hydroxides are NaOH and KOH. The compounds
BalOH), Sr(OH), and Ca(OH), are marginally soluble. 6. Most sulfide (S), carbonate (CO²),
chromate (Cro.?"), and phosphate (PO.') salts are only slightly soluble.
Solution
There are no such rules about the solubility of ZnCl2 so it is not be soluble in water.
According to rule four lead sulphate is soluble.
According to rule 6, Magnesium carbonate may be soluble in water.
From rule 2 and 6 so ammonium carbonate is soluble in water.

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4. Use your solubility table to predict whether the following compounds will be soluble in water at 25°C: (5 points) CompoundSoluble/Insoluble CaSO4 K2SO4 Ba(OH)2 BeS CuCl2 Solubleinsolüble Compound Mg(NO3)2 CaCl2 Al2S3 (NH4)3PO4 SrCO3 Solution First see the rules of solubility:1)Rule for phosphates says all phosphates are insoluble except for the alkali metals and NH4+. 2) Rule for nitrates: All nitrates are soluble. 3) Rule for sulfides: All sulfides are insoluble except those of the alkali metals, alkali earths, and NH4+. 4) Rule for Chlorides: All chlorides are soluble except AgCl, Hg2Cl2, and PbCl2 Mg(NO3) Soluble in water CaCl2 Soluble in water Al2S3: Aluminum sulfide actually reacts with water to form aluminum hydroxide and hydrogen sulfide gas.Thus it decomposes in water instead of dissolving. (NH4)3PO4: Soluble in water SrCO3: not soluble in water. t dissolves in water caso4 : yes Soluble in water K2SO4 :yes Soluble in water Ba(OH)2 : yes Soluble in water BeS: yes Soluble in water CuCl2: yes Soluble in water.

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Acids are substances that form hydrogen ions, H+(aq), when dissolved in water In acid solutions there are more H+ ions than OH- ions. Bases which are soluble in water are called alkalis e.g. NaOH sodium hydroxide, KOH potassium hydroxide or Ca(OH)2 calcium hydroxide. Bases which are water insoluble include CuO copper(II) oxide, MgO magnesium oxide. After a neutralisation, the salt solutions consist of a mixture of positive and negative ions (and their names are in the salt name!) e.g. sodium chloride (NaCl) is a mixture of Na+ and Cl- ions, calcium chloride (CaCl2) is a mix of Ca2+ and Cl- ions; magnesium nitrate (Mg(NO3)2) is a mix of Mg2+ and NO3- ions, aluminium sulphate (Al2(SO4)3) consists of Al3+ and SO42- ions etc. You can test for chloride ions by adding a few drops of dilute nitric acid followed by a few drops of silver nitrate solution. If chloride ions are present you will see a white precipitate of silver chloride. However, chlorine water itself will contain chloride ions as chlorine in aqueous solution disproportionates to form chloride and chlorate(I) ions. Cl2 + H2O --> Cl- + ClO- + 2H+ Testing for the presence of nitrate via wet chemistry is generally difficult compared with testing for other anions, as almost all nitrates are soluble in water. In contrast, many common ions give insoluble salts, e.g. halides precipitate with silver, and sulfates precipitate with barium. The nitrate anion is an oxidizer, and many tests for the nitrate anion are based on this property. Unfortunately, other oxidants present in the analyte may interfere and give erroneous results. Solution Acids are substances that form hydrogen ions, H+(aq), when dissolved in water In acid solutions there are more H+ ions than OH- ions. Bases which are soluble in water are called alkalis e.g. NaOH sodium hydroxide, KOH potassium hydroxide or Ca(OH)2 calcium hydroxide. Bases which are water insoluble include CuO copper(II) oxide, MgO magnesium oxide. After a neutralisation, the salt solutions consist of a mixture of positive and negative ions (and their names are in the salt name!) e.g. sodium chloride (NaCl) is a mixture of Na+ and Cl- ions, calcium chloride (CaCl2) is a mix of Ca2+ and Cl- ions; magnesium nitrate (Mg(NO3)2) is a mix of Mg2+ and NO3- ions, aluminium sulphate (Al2(SO4)3) consists of Al3+ and SO42- ions etc. You can test for chloride ions by adding a few drops of dilute nitric acid followed by a few drops of silver nitrate solution. If chloride ions are present you will see a white precipitate of silver chloride. However, chlorine water itself will contain chloride ions as chlorine in aqueous solution disproportionates to form chloride and chlorate(I) ions. Cl2 + H2O --> Cl- + ClO- + 2H+ Testing for the presence of nitrate via wet chemistry is generally difficult compared with testing for other anions, as almost all nitrates are soluble in water. In contrast, many common ions give insoluble salts, e.g. halides precipitate with silver, and sulfates .

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The three main categories of chemical compounds are acids, bases and salts. These compounds are always part of our daily lives in terms of what we eat and use. The human body contains some very common acids like dilute hydrochloric acid in the stomach, which aids in digestion of food. If the contents of our stomach become too acidic, it results to a burning sensation in the stomach. Acids and bases also regulate metabolic activities in the human body through equilibrium processes. Acids contain hydrogen ions (H+). A base is a substance, which on dissolving in water yields hydroxyl ions (OH-) as the only negative ions. Salts are formed by the combination of an acid and base.

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4: A piece of lead metal was added to an aqueous solution of copper(II) nitrate, and within a few minutes it was observed that the lead turned black and crumbled, and the blue solution characteristic of copper(II) ions faded. (NOTE: Lead forms a 2+ ion whern it reacts.) Write molecular, ionic and net ionic equation. Identify spectator ions. Solution molecular equation is Pb(s) + Cu(NO3)2 (aq)..................> Pb(NO3)2 (aq) + Cu(s) Ionic equation is Pb(s) + Cu2+ (aq) + 2 NO3- (aq)..................> Pb2+ (aq) + 2 NO3- (aq) + Cu(s) Net ionic equation is Pb(s) + Cu2+ (aq).................> Pb2+ (aq) + Cu(s) spectator ion is NO3- (aq) that is nitrate ion..

4 A piece of lead metal was added to an aqueous solution of copper(I.pdf

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Question 3 2 pts A(n) during a specified period. provides a financial summary of a firm\'s operating results statement of retained earnings O income statement O statement of cash flows O balance sheet Solution A Financial summary showing the operating results of a specified period means a statement showing the sales/revenues, expenses of the reporting entity over the reporting period. Such a financial summary is called an income statement. Thus the answer is Income Statement..

Researchers are interested in studying whether personality is relate.pdf

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