Mass-mol-mol-mass
How many moles of Al2O3 will be produced when 23.9g of H2O is reacted?
2 AlCl3(aq) + 3 H2O(l)---> Al2O3(s) + 6HCl
0.443mol
20.00ml sample of unknown H3PO4 solution requires 120.5ml of 0.100 M KOH to react with H3PO4. What is the strength of H3PO4 solution?
H3PO4(aq) + 3 KOH(aq)---> 3 H2O + K3PO4(aq)
0.0201 M H3PO4
How much 12 HCl do we need to make 65ml of 0.6 M HCl?
3.25ml is needed
If PH is 2.7, what is the (H+)?
0.001995 or 1.995x10^-3
Which of the following is the general property of a basic solution?
Tastes sour
pH of 4
Feels slippery
None of above
Feels slippery
21.0g FeO needs how many grams of Al?
3 FeO(s) + 2 Al(s)---> Al2O3 + 3 Fe(s)
5.26gAl
Solution of 400. ml of 0.500 M LiF from 6.00 M LiF. What volume is required?
33.3ml
How much NaCl do we need to make 500 ml of 0.26 M NaCl?
7.60g
What is the pH of a solution if H+ is 3.3x10^-6 M?
5.48 pH
What are ways to speed up the solubility?
Mix, heat, and grind
What is the mass of silver bromide (187.77g/mol) precipitated from 3.50 g of iron lll bromide (295.55) g/mol) reacting with silver nitrate?
FeBr3 (s) + 3 AgNO3 (aq)ā 3 AgBr (s) + Fe(NO3)3 (aq)
6.67g
If it takes 23.10 ml of HCl to neutralize 37.25ml of 0.315M Mg(OH)2, how concentrated is HCl?
2 HCl (aq) + Mg(OH)2 (aq)---> MGCl2 (aq) + 2 HOH
1.02 M HCl
16g NaOH is dissolved in 550 ml of solution, what is its strength?
0.727 M
If 0.015 M H2so4 has (H+)= 0.030, then what is the (OH-)?
3.33x10^-13
As temperature increases, the solubility of a gas in liquid _
decreases
In an experiment, 7.68g of iron metal reacts with 4.00g of sulfur. What is the mass of the product?
Fe+Sā FeS
11.0g FeS
What is the minimum amount of 4.0 M H2SO4 necessary to produce 10g of H2 gas?
2 Al(s) + 3H2SO4 (aq)---> Al2(SO4)3 + 3 H2(g)
1237.6 ml or 1.2376L
If 100 ml of 0.1 MgBr2 reacts with 18.2ml of AgNO3, what is the concentration of AgNO3?
MgBr2(aq) + 2AgNO3 (aq) ---> Mg(NO3)2 (aq) +
2 AgBr(s)
1.10 M AgNO3
1.7x10^-5 M Mg(OH)2 has (OH-)=3.4x10^-5, what is (H+)?
2.94x10^-10
Which of the following is the best electrolyte assuming all of them are equally soluble?
HCl
H2SO4
FeCl3
NaCl
3. FeCl3
If there are 100 grams of C3H8, how many grams of CO2 are there?
C3H8 + 5 O2---> 4 H2O + 3 CO2
299gCO2
How much 0.515 M H3PO4 is needed to neutralize 45.00 ml of 0.311 M Ca(OH)2?
2 H3PO4(aq)+3 Ca(OH)2(aq)---> Ca3(PO4)2(s)+
6 HOH
18.12ml or 0.01812L
Throwing some scrap iron in gold nitrate solution causes gold metal to ppt. How much 0.50 M gold nitrate solution reacts with 224g of iron metal?
3 Fe(s) + 2 Au(NO3)3(aq)---> 3 Fe(NO3)2 (aq) + 2 Au
5.3 L or 5300ml
What are the H+ and OH- of a sample of solution that has pH=8.50?
3.0x10^-9 [H+]
3.3x10^-6 [OH-]
Which one is base and which one is acid?
C2H5N(aq) + H2) ---> C2H5NH+(aq) + OH-
Base:C2H5N
Acid: H2O