1. How many ml of 1.0 molar HNO3 will neutralize 0.237g of Mg (OH) 2? show work
ID: 787610 • Letter: 1
Question
1. How many ml of 1.0 molar HNO3 will neutralize 0.237g of Mg (OH) 2? show work please
A.8.1
B.16.1
C.4.1
D6.2
2. What mass of AgCl forms from the reaction of excess AgNo3 with 50 ml of .20M solution of BaCl2? Please show work
A.1.4g
B.2.9g
C.0.70g
D.3.4g
3. A chemist places AgNo3 in one flask and NaBr in anothere water is added to both and the mixture in the 1st flask is added to the second which choice describes the results of experiment?
A. Both of the compounds in the flasks dissolved wjen water is added and AgBr percipitates when the contents are mixed
B.both compunds in the flask dissolved when water is added and NaNo3 precipitates when mixed
C.both contents dissovle when water added and when mixed together no precipitate forms
I put c for number 3
Explanation / Answer
1)
molecular wt of Mg(OH)2 =58.3
there fore moles = 0.237/58.3 =0.004 moles
Mg(OH)2 +2HNo3--->Mg(NO3)2 +2H2O
there fore moles of HNO3 that neutralizes Mg(OH)2 is 0.008
ans is (a)
2)
nof o f moles of Bacl2 =0.2 *0.05 =0.001 moles;
2AgNO3 +BaCl2 ---> 2AgCl + Ba(No3)2;
there fore moles of agcl is 0.002 =0.002*(107+35.5)0.285gms therefore answer is (b)
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