Ammonia (Nil,) n a weak hnc ihai reacts with a strong acid 10 form the ammonium

Question

Ammonia (Nil,) n a weak hnc ihai reacts with a strong acid 10 form the ammonium ion. Ml. H - w a wluion of an ammonia cleaner is tiuatcd directly v..th 42 mL of0 5000 U HCI. wtiat is the concentration of the Nil, in lolmina'IAiuanr 1K.1 rtw .. |K rnlv toll ae that reacts the acid)of silver chloride will he recovered if excess sodium chloride is added to 500 mL of solution containing 10.79 g of Age? Why one of the following reaction equation* n the net ionic equation foe the reaction of hydrochloric acid with lithium hydroxide? All species are in aqueous volution Hard water contains Mg' and Ca'* ions and tends to form a rmg in a bathtub due to its reaction with the lOluMe anions in soap. The formation of this insoluble raatenal is an example ofide is insoluble. Write the net ionic equation for the reactkxi that take place between a solution of magnesium chloride and a solution of sodium hydroxide.

Explanation / Answer

7)

identify acid in the next acid-base reaction

PbCO2 + H2SO --> PbSO2 + CO2 + H2O

The acid is the H2SO4, answer is e

8)

1 g in 1 l

spectator ions if

Ca(OH)2 + HCl --> CaCl2 + 2H2O

The catual reaction:

2OH + H --< H2O

spectator ions are Ca+2 and Cl- ... which is answer A

9)

V =5 ml of solution

V = 42.6 ml of 0.5 HCl

find concentration

M1V1 = M2V2

M1*5 = 0.5*42.6 --> M1 = 4.26 M

which is C

10)

AgCl will be recovered if we add 500 ml of a solution of 10.79 g of Ag+

MW of Ag+ = 107.8

mol = mass/MW = 10.79/107.8 = 0.1 mol

therefore, expect 0.1 mol of AgCl in rpecipitate

MW of AgCl = 142.8

mass = 0.1*142.8 = 14.2 grams of AgCl which is answer E

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