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solong [7]
3 years ago
12

Classify these salts as acidic, basic, or neutral. KCL, NH4Br, K2CO3, NaCN, LiClO4? This is what I put but got it wrong: KCl = b

asic NH4Br = acidic K2CO3 = basic NaCN = basic LiClO = Neutral Can someone me what I did wrong, thanks.
Chemistry
2 answers:
Alenkinab [10]3 years ago
8 0

KCl : neutral

NH₄Br : acidic

K₂CO₃ : basic

NaCN : basic

LiClO : basic

<h3>Further explanation</h3>

Salt is an ion compound consisting of metal cations and residual acid anions. Cation salts can come from a base and anions come from acids. So that each salt has a base component and an acid component

So there are 4 properties of salt

1. salts from strong acids and strong bases are neutral

2. salts from strong acids and weak bases are acidic

3. salts from weak acids and strong bases are basic

4. salts of weak acids and weak bases depend on the value of the ionization constant of the acid and its base (Ka and Kb)

Ka> Kb is acidic

Ka <Kb is basic

Ka = Kb is neutral

  •  1. KCL,

salt of strong acid HCl and strong base of KOH, neutral

  • 2. NH₄Br,

salt of strong acid HBr and weak base NH₄OH, acidic

  •  3. K₂CO₃,

salt of H₂CO₃ weak acid and strong base KOH, basic

  • 4. NaCN,

salt of a weak acid HCN and a strong base NaOH, basic

  • 5. LiClO

salt of a weak acid HClO and a strong base LiOH, basic

<h3>Learn more </h3>

the Bronsted-Lowry definition of an acid

brainly.com/question/3201146

the Bronsted-Lowry definition of a base

brainly.com/question/4083753

the acids and the bases in the chemical equation according to Bronsted-Lowry Theory

brainly.com/question/12308171

Keywords:  acid, base, salt

MaRussiya [10]3 years ago
3 0
In classifying salts as neutral, acidic, or basic, it is important to take note of the strength of the acids and bases that they come from. A strong acid and strong base produce a neutral salt. A weak acid and strong base produce a basic salt. A strong acid and weak base produce an acidic salt. So the answers must be:

KCl = neutral (from HCl and KOH)
NH4Br = acidic (from NH4 and HBr)
K2CO3 = basic (from KOH and H2CO3)
NaCN = basic (from NaOH and HCN)
LiClO = basic (from LiOH and HClO)
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Calculate the cell potential at 25oC under the following nonstandard conditions: 2MnO4-(aq) + 3Cu(s) + 8H+(aq) ⟶ 2MnO2(s) + 3Cu2
baherus [9]

Answer:

1.346 v

Explanation:

1) Fist of all we need to calculate the standard cell potential, one should look up the reduction potentials for the species envolved:

(oxidation) Cu_{(s)} →Cu^{2+}_{(aq)} +2e E°=0.337 v

(reduction) MnO_{4 (aq)} + 3e + 4H^{+}_{(aq)}→MnO_{2 (aq)}+2H_{2}O E°=1.679 v

(overall) 2MnO_{4 (aq)}+3Cu_{(s)}+8H^{+}_{(aq)}→3Cu^{2+}_{(aq)}+2MnO_{2 (aq)}+4H_{2}O E°=1.342 v

2) Nernst Equation

Knowing the standard potential, one calculates the nonstandard potential using the Nernst Equation:

E=E^{0} -\frac{RT}{nF}Ln\frac{[red]}{[ox]}

Where 'R' is the molar gas constant, 'T' is the kelvin temperature, 'n' is the number of electrons involved in the reaction and 'F' is the faraday constant.

The problem gives the [red]=0.66M and [ox]=1.69M, just apply to the Nernst Equation to give

E=1.342 -\frac{298.15*8.314}{6*96500}Ln\frac{[.66]}{[1.69]}=1.346

E=1.346

5 0
3 years ago
A) Compute the repeat unit molecular weight of polystyrene. B) Compute the number-average molecular weight for a polystyrene for
Andrej [43]

Answer:

Explanation:

In Polystrene, the molecular formula for the repeat unit = C_8H_8;

and the atomic weights of Carbon C = 12.01 g/mol

For Hydrogen, it is 1.01 g/mol

Hence, the repeat unit molecular weight is:

m = 8 (12.01 g/mol)+8(1.01 g/mol)

m = 96.08 g/mol + 8.08 g/mol

m = 104.16 g/mol

The degree of polymerization = no-average molecular weight/repeat unit molecular weight.

Mathematically;

DP = \dfrac{\overline M_n}{m}

\overline M_n= DP \times m

\overline M_n= 25000 \times 104.16 \ g/mol

\overline M_n= 2604000  \ g/mol

7 0
3 years ago
Are isotopes similar to ions, yes or no?
AysviL [449]

Answer:

Yes

Explanation:

Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. Everything else about them is the same.(If you want more explanation tell me).

5 0
1 year ago
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2NO(g) N2(g) + O2(g); Keq = 2.1 × 1030 What does the value of the equilibrium constant indicate?
olga_2 [115]
The equilibrium constant is a value which represents the equilibrium of a reaction. It is a reaction quotient when the reaction reached equilibrium. If Keq is greater than 1, the mixture contains mostly the products. On the other hand, if Keq is less than 1, the mixture contains the reactants. For this case, the mixture contains mostly products.
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MA_775_DIABLO [31]

Answer:

0.488atm = Pressure Kr

Explanation:

The total pressure in a mixture of gases could be defined as the sum of the partial pressures of a mixture. For the mixture of gases in the problem:

Total pressure = Pressure He + Pressure Ar + Pressure Ne + Pressure Xe + Pressure Kr

Converting the total pressure to atm:

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Replacing:

1.648atm = 0.32atm + 0.21atm + 0.44atm + 0.19atm + Pressure Kr

<h3>0.488atm = Pressure Kr</h3>
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3 years ago
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