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Serga [27]
3 years ago
12

Classify each of the following substances as either a strong or weak acid, strong or weak base, or a soluble or insoluble salt.

Chemistry
1 answer:
sleet_krkn [62]3 years ago
6 0

Answer:

KOH is a strong base, HClO_{4} is a strong acid, HNO_{2} is a weak acid, NaBr is a soluble salt and PbCl_{2} is an insoluble salt

Explanation:

According to solubility rule, all chlorides, bromides and iodides of metal ions are soluble except for Pb^{2+},Ag^{+} and Hg^{+}[/tex].

Therefore NaBr is a soluble salt and PbCl_{2} is an insoluble salt.

There are seven strong acids : HCl, HBr, HI, H_{2}SO_{4}, HNO_{3}, HClO_{3} and HClO_{4}.

All group IA metal hydroxides e.g. NaOH, KOH etc. are strong base. Also, Ca(OH)_{2}, Sr(OH)_{2} and Ba(OH)_{2} are strong bases.

So, KOH is a strong base, HClO_{4} is a strong acid and HNO_{2} is a weak acid.

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what criteria are likely to dictate certain pairs of elements to undergo ionic bonding and others covalent bonding?
Paha777 [63]

Answer:

If one element is a metal and the other element is a non metal

Explanation:

Ionic bonds are formed between metals and non metals. The nonmetal atom receives electron(s) from a metal atom to form an ionic substance. This means that ionic substances are basically an ion pair.

Covalent bonds are mostly formed between two nonmetals. These elements share electrons with each other in order to form the compound.

7 0
2 years ago
If the atmospheric pressure in the laboratory is 1.2 atm, how many moles of gas were in each syringe? (Hint: Choose one volume a
Naily [24]

Answer:

A: 2.525 x 10-4 mol

B: 2.583 x 10-4 mol

Explanation:

Part A:

Data Given:

. Temperature of water (H2O) = 21.3°C

Convert Temperature to Kelvin

T = °C + 273

T = 21.3 + 273 = 294.3 K

volume of (H2O) gaseous state = 5.1 mL

Convert mL to liter

1000 mL = 1L

5.1 ml = 5.1/1000 = 0.0051 L

Pressure = 1.2 atm

. no. of moles = ?

Solution

no. of moles can be calculated by using ideal gas formula

PV = nRT

Rearrange the equation for no. of moles

n=PV/RT......... (1)

where

P = pressure

V = Volume

T= Temperature

n = Number of moles

R = ideal gas constant

where

R = 0.08206 L.atm/ mol. K

Now put the value in formula (1) to calculate no. of moles of

n = 1.2 atm x 0.0051 L / 0.08206 L.atm.mol-1. K-1 x 294.3 K

n = 0.0061 atm.L / 24.162 L.atm.mol-1

n = 2.525 x 10-4 mol

no. of moles of gas (H2O) = 2.525 x 10-4 mol

Part B:

Data Given:

Temperature of water (H2) = 21.3°C

Convert Temperature to Kelvin

T = "C + 273

T= 21.3 + 273 = 294.3 K

volume of (H2) gas = 5.2 mL

Convert mL to liter

1000 mL = 1 L

5.2 ml = 5.2/1000 = 0.0052 L

Pressure = 1.2 atm

. no. of moles = ?

Solution

no. of moles can be calculated by using ideal gas formula

PV = nRT

Rearrange the equation for no. of moles

n= PV / RT......... (1)

where

P = pressure

V = Volume

T= Temperature

n = Number of moles

R = ideal gas constant

where

R = 0.08206 L.atm/mol. K

Now put the value in formula (1) to calculate no. of moles of

n = 1.2 atm x 0.0052 L/0.08206 L.atm.mol-1. K-1 x 294.3 K

n = 0.0062 atm.L/ 24.162 L.atm.mol-1

n = 2.583 x 10-4 mol

I

no. of moles of gas (H2) = 2.583 x 10-4 mol

8 0
3 years ago
Nvm i got the answer
balandron [24]
Good luck with your assignment :)
4 0
2 years ago
If you have 3cm of each<br> substance, which would<br> have the MOST MASS
lesantik [10]
The most mass is in my grandmas, because she a big lady. Respectfully.
5 0
3 years ago
H2O2 → H2O + O2
vladimir2022 [97]

Answer:

75.47

Explanation:

AS WE CANT WEIGHT AIR THE ANSWER IS CORRECT

8 0
2 years ago
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