QUESTION 5 1 points Save Answer Small amounts of the solid salts AgNO3, Fe(NO3)2

Question

QUESTION 5 1 points Save Answer Small amounts of the solid salts AgNO3, Fe(NO3)2 and AI(NO3)3 are dissolved in about 1 mL of water in three separate test tubes. A few drops of saturated NaCl solution are added to each test tube. Which of the three salts can be identified? Why can that salt be identified? (Check beside the salt and beside the best reason below.) O AgNO3 Fe(NO3)2 It is the only one that forms a precipitate. It is the only one that forms a liquid. It is the only one that forms a gas. It is the only one that does not form a precipitate. It is the only one that does not form a gas. QUESTION 6 1 points Save Answer Small amounts of the solid salts Na2SO4, Na2S03 and Na3PO4 are dissolved in about 1 mL of water in three separate test tubes. A few drops of concentrated HCl(aq) solution are added to each test tube. Which of the three salts can be identified? Why can that salt be identified? (Check beside the salt and beside the best reason below.) Na2SO4 O Na2SO3 NagPO4 It is the only one that forms a precipitate. It is the only one that forms a liquid. It is the only one that forms a gas. It is the only one that does not form a precipitate. It is the only one that does not form a gas.

Explanation / Answer

Q5

Note that only Cl- ions will form AgCl

therefore

only AgNO3 can be identified, if there is precipitate (white)

otherwise, it is not present

Q6

Note that

addition of HCl = H+ wil lfavour

2HCl + Na2SO3 --> H2O + SO2(g) + 2NaCl

only Na2SO3 is the one which forms gas

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