CHM191 INTRODUCTORY PRACTICAL CHEMISTRY 1 TMA4 QUESTIONS AND ANSWERS

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Chm191 introductory practical chemistry 1 TMA4

Question 1 Acid base titration involves a_____ reaction?

Answer is redox

Question 2 in an indicator that is colourless in acidic solution is______?

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Answer is phenolphthalein

Question 3 a measure of the hydrogen ion concentration in a solution is ____?

Answer is ph

Question 4 towards the ____ point both college form will be present in appreciable quantity?

Answer is end point

Question 5 the ph of a solution is a measure of the_______?

Answer is hydrogen ion concentration

Question 6 the sum of the oxidation state of all element in a neutral compound add to_____?

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Answer is zero

Question 7 the oxidation state of( C) carbon in H2C2O4?

Answer is + 4

Question 8 a process that is accompanied by a heat gun is said to be____,?

Answer is endothermic.

Question 9 if a reaction is carried out at a constant pressure the absolute value of the heat of reaction is equal to the absolute value of the _____of the reaction?

Answer is enthalpy

Question 10 the reaction between aqueous sodium hydroxide and aqueous hydrochloric acid is a____ reaction?

Answer is neutralization

Question 11 a substance that lose an election is said to be?

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Answer is oxidized

Question 12 a suitable indicator for titration between weak acid and strong base is_____?

Answer is phenolphthalein

Question 13 all these are example of a chemical reaction except?

Answer is addition of ammonium chloride to water

Question 14 the product represent by in the following equation

H2SO4 + Na2CO3 -> NaHCO3 + ?

Answer is NaHSO4

Question 15 if the mass of an impure acid is 18.0g and mass of impurity is 12.3 gram calculate the percentage impurity of this solution?

Answer is 68.33%

Question 16 the heat of reaction is measured by the use of_____?

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Answer is calorimeter

Question 17 the oxidation state of chromium in Cr2O72-?

Answer is + 6

Question 18 the reactant represented by the in the equation H2O + ? -> 2H2O?

Answer is H2O

Question 19 the product represented by d in the equation CH3COO- + H+ + Na+ + OH- -> ? + H2O?

Answer is CH3COO-Na

Question 20 the ph scale range is_______?

Answer is 0 to 14.

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