Top 10k strings from Acids, Bases and Salts (1982)(Calpac Educational Software).z80 in <root> / bin / z80 / software / Sinclair Spectrum Collection TOSEC.exe / Sinclair ZX Spectrum - Utilities & Educational / Sinclair ZX Spectrum - Utilities & Educational - [Z80] (TOSEC-v2007-01-01) /
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7 t$="true ":
6 o$="true ":
4 o$="false":
4 e$="not correct":
3 t$="false":
2 t$="true "
2 o$="true "
1 strength of an acid."''"Sulphur dioxide is very soluble in water. Sulphurous acid is"'"formed, but this is a rather"'"weak acid.":
1 s$="true "
1 s$="false"
1 r$="not correct"
1 r$="correct "
1 of the hydrogens of an acid arereplaced by metal ions."''"Potassium hydrogensulphate is"'"an
1 greater than
1 f$="true "
1 e$="correct ":
1 carbon dioxide
1 Second statement
1 Question ";n''"
1 Is the second statement true?
1 Is the 2nd statement a correct explanation of the 1st?
1 H O (aq)+Cl (aq)
1 First Statement"
1 An acid is a proton (hydrogen"'"ion) donor
1 Acid + Base
1 ;"Type y or n.
1 ;"Type e for explanation/comment otherwise press the ENTER key."
1 ;"Type 1, 2 or 3."
1 ;"Press the ENTER key to continue."
1 ;"Is the first statement true?"
1 ;"Acids, Bases and Salts."
1 ;"1. A revision tutorial"''" 2. A simple test"''" 3. A copy of the questions"'"
1 ."'''"The products of the reaction arecopper sulphate(blue) and water."'''"H SO + CuO
1 ."''"For example, if the acid is"'"hydrochloric acid, then:"''"Na CO + 2HCl
1 , and so must contain hydrogen."''"When an acid reacts with a base the hydrogen ions are replaced by metal ions (or other cations such as the ammonium ion) to"'"give a salt.":
1 )+("Well done."
1 )+("Very good."
1 )+("Good."
1 ("Excellent."
1 ''''" Acids, Bases and Salts."''"
1 '"You correctly answered ";s;" out"'"of 10 questions."''
1 '" H O + SO
1 & Educational Software
1 "pH 7 corresponds to a neutral solution."''"Acids in aqueous solution give apH of
1 "correct "
1 "Your very low score indicates a poor understanding of this topic"
1 "Your answer was wrong."
1 "You were wrong."
1 "You need to spend more time on this topic."
1 "You need to read through your notes and text-book again,"'"and then re-run this program."
1 "You cannot give a reason for a definition or commonly accepted term."''"Scientists have simply agreed to use the term in that way so that they can understand each other.":
1 "When the two colourless"'"solutions are mixed, bright"'"yellow crystals of lead iodide are formed."''"Pb(NO ) + 2KI
1 "When ammonia gas is dissolved inwater it forms an alkaline"'"solution":
1 "Well done, you were right.":
1 "Well done, you were right."
1 "Unfortunately you were wrong."''l$
1 "This is sometimes used as the"'"definition of an acid."''"
1 "There is no direct connection between solubility and the"'"
1 "The solution of hydrogen"'"chloride in water is more fully"'"represented by:"'''," +
1 "The majority of acids do containoxygen, e.g."''" HNO
1 "The hydrogen ions (protons) are bonded to water molecules"'"forming
1 "The colourless gas is carbon dioxide."''"
1 "The colourless gas formed when acids react with sodium"'"carbonate is
1 "The colour of solutions of metalsulphates depends on the colour of the metal ion, as the"'"sulphate ion is colourless."''"The majority of common metal"'"ions are colourless in solution.Exceptions include:"''" Copper (2+) Blue"'" Iron (2+) Pale green"'" Iron (3+) Brownish-yellow":
1 "Sulphur dioxide is an acidic"'"oxide."''"It dissolves in water to give sulphurous acid."'''"
1 "Sulphur dioxide dissolves in"'"water to form sulphurous acid":
1 "Potassium hydrogensulphate is a normal salt":
1 "Potassium hydrogensulphate is formed when equal numbers of"'"moles of potassium hydroxide andsulphuric acid are mixed":
1 "No, You were wrong.":
1 "Metal sulphates always give"'"colourless aqueous solutions":
1 "Many acids are formed when non- metal oxides are dissolved in water."'"E.g., sulphur trioxide dissolves to give sulphuric acid:"''" H O + SO
1 "Lime-water is a saturated"'"solution of calcium hydroxide."''"This reacts with carbon dioxide to give calcium carbonate."''"Ca(OH) + CO
1 "Lead iodide is quite soluble in hot water":
1 "Lead iodide is almost insoluble in cold water, but does dissolvein hot water to give a"'"colourless solution."''"When this solution is cooled, the lead iodide crystallises outas glittering yellow crystals.":
1 "Lead iodide can be prepared by mixing cold solutions of lead nitrate and potassium iodide":
1 "Lead iodide can be prepared by mixing cold solutions of lead nitrate and potassium iodide because it is insoluble in cold water, and not because it is"'"soluble in hot water.":
1 "Hydrogen chloride is very"'"soluble in water."''"When it dissolves the molecules split up to form ions. The ions are hydrated.":
1 "Hydrochloric acid is formed by dissolving hydrogen chloride gasin water":
1 "Hydrochloric acid is a strong acid":
1 "H SO + KOH
1 "Good, your answer was correct."
1 "Good, you were right."''l$
1 "Ethanoic acid dissolves in waterto give a solution of pH 7":
1 "Ethanoic (acetic) acid in"'"aqueous solution is a weak acid":
1 "Do you want:";
1 "Do you want to run the program again?"
1 "Do you want to go through the questions in which you made"'"mistakes?"
1 "Carbon dioxide turns lime-water milky":
1 "Carbon dioxide is classified as an acidic oxide":
1 "Carbon dioxide is classified as an acidic oxide because it will react with and neutralise bases."''"The reaction with lime-water is just one example of this"'"behaviour."''"Note that other acidic oxides may react with lime-water, but they do not turn it milky." :
1 "Carbon dioxide dissolves in"'"water giving carbonic acid:"''" H O + CO
1 "Both statements are true, and the 2nd is a correct explanationof the 1st."'l$'
1 "Black copper oxide does dissolvein dilute sulphuric acid, but"'"the solution formed is
1 "Black copper oxide dissolves in dilute sulphuric acid to form a colourless solution":
1 "Ammonia reacts with water to"'"form hydroxide ions":
1 "Ammonia is a
1 "Ammonia acts as a base by"'"accepting a hydrogen ion from a water molecule."''"This yields ammonium and"'"hydroxide ions:"''," +
1 "All acids may be formed by"'"dissolving non-metal oxides in water":
1 "All acids contain oxygen":
1 "Acids react with sodium"'"carbonate giving a colourless"'"gas":
1 "Acids contain hydrogen which maybe replaced by a metal":
1 "A weak acid is one which is only
1 "A strong acid is highly ionised,and so gives a high"'"concentration of hydrogen ions."''"Hydrochloric acid consists of hydrogen ions and chloride ions in aqueous solution."'',"+
1 "A solution of sulphur dioxide in water turns red litmus blue":
1 "''"This reaction is characteristic of acids.":
1 " The second statement was ";t$;" ":
1 " The first statement was ";o$;" ":
1 uses a lone pair of
1 the water molecule
1 salt."'''" H SO
1 salt is formed when
1 on your printer?";
1 is not the reason why
1 ions:"''''"
1 ionised."''"In water, most of the ethanoic acid is present as molecules."'"Only a small proportion is"'"ionised."'',"
1 hydrogen ion.":
1 gives "''"Salt + Carbon Dioxide + Water
1 f$="false"
1 electrons to form a
1 dative bond to the
1 and so gives asolution with a pH
1 The fact that
1 Please type y
1 K SO"'" 2 4
1 J J WARREN 1982
1 CaCO + H O
1 BSc ARCS Cert Ed
1 Acids turn blue litmus red.
1 Acid + Metal Carbonate
1 7."''''"The pH of dilute ethanoic acid solution is about 3."''"(The exact value depends upon the concentration).":
1 7."''"Ammonia solution turns red"'"litmus blue, thus showing that the solution is alkaline.":
1 4"''"The hydroxide ions make the"'"solution alkaline.":
1 4 2"''"When one mole of potassium"'"hydroxide reacts with one mole of sulphuric acid, only one of the hydrogens of the acid is"'"replaced by potassium ions.":
1 3"'''" +"'"H O is the hydrated hydrogen 3 ion. It is called the
1 3"''"The precipitated lead iodide canbe separated from the potassium nitrate solution by filtration.":
1 3"''"The hydrogen ions make the"'"solution acidic.":
1 3 2"''"The calcium carbonate formed is insoluble in water, and forms a milky-white suspension.":
1 2NaCl + CO + H O
1 2-"'" H SO
1 2 4"''"However, it is not true of all acids."''"Hydrochloric acid is made by"'"dissolving hydrogen chloride"'"gas (HCl) in water.":
1 2 4"''"A few acids do not contain"'"oxygen. Hydrochloric acid, HCl, is one example.":
1 2 4"''"
1 2 3"''"The sulphurous acid ionises to give hydrogen and sulphite ions:"'',"+
1 2 3"''"Carbon dioxide also reacts with and neutralises bases, for"'"example, with sodium hydroxide solution:"''" CO + 2NaOH
1 2 3 2":
1 1982 J J Warren
1 -"'"NH + H O
1 -"'"HCl(g)+H O(l)
1 -"'" HCl
1 +"'" CH CO H
1 + The oxygen atom of
1 Salt + Water
1 PbI + 2KNO
1 Na CO + H O
1 NH + OH
1 KHSO + H O "'" 2 4
1 H SO"'" 2
1 H SO"'" 2
1 H CO "'" 2
1 CuSO + H O 2 4
1 2H + SO"'" 2 3
1 H + Cl"
1 CH CO + H"'" 3 2