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3 years ago

Why does water have the highest intermolecular forces

Chemistry

1 answer:

neonofarm [45]3 years ago

8 0

Answer:

Water has polar O-H bonds. The negative O atoms attract the positive H atoms in nearby molecules, leading to the unusually strong type of dipole-dipole force called a hydrogen bond.

Explanation:

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Explain why substances with a lower boiling point are removed near the top of a petroleum fractional distillation tower.

Anon25 [30]

The lighter components are able to rise higher in the column before they are cooled to their condensing temperature, allowing them to be removed at slightly higher levels.

I hope this helps

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4 years ago

What happens to PH of basic solution as you add water

Arlecino [84]

Answer:

to fall towards 7, making the solution less alkaline as more water is added.

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2 years ago

Read 2 more answers

All of the following happen when an acid reacts completely with a base EXCEPT: the pH moves to 0 on the pH scale the pH is equal

IgorLugansk [536]

Answer: the pH moves to 0 on the pH scale

Explanation:

A base is defined as a substance which donates hydroxide ions when dissolved in water and an acid is defined as a substance which donates hydrogen ions in water.

Neutralisation reaction is defined as the chemical reaction in which an acid reacts with a base to produce a salt and water molecule. The $H^+$ ions from acid are neutralised by $OH^-$ ions from base.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH of 7.

4 0

3 years ago

When 40.0 mL of 0.200 M HCl at 21.5°C is added to 40.0 mL of 0.200 M NaOH also at 21.5°C in a coffee-cup calorimeter, the temper

MakcuM [25]

Answer:

The enthalpy change for the reaction is ΔH = - 54.3 kJ/mol

Explanation:

The reaction between HCl and NaOH is a neutralization reaction:

$HCl + NaOH \rightarrow NaCl + H2O$

Heat released during neutralization = Heat gained by water

i.e. $\qrxn = -\q(solution)-----(1)$

where:

$\q(solution) = mc\Delta T-----(2)$

m = total mass of solution

$m = density*total\ volume = 1.00g/ml*(40.00+40.00)ml = 80.00\ g$

ΔT = change in temperature = 22.8 - 21.5 = 1.3 C

c = specific heat = 4.18 J/g C

$\q(solution) = 80.00g*4.18J/gC*1.3C = 434.7 J$

As per equation (1): qrxn = -434.7 J

The reaction enthalpy ΔH is the heat released per mole of acid (or base)

$Moles\ of\ HCl = V(HCl) * M(HCl) = 0.040 L*0.200moles/L = 0.008\ moles$

$\Delta Hrxn = \frac{q}{mole}=\frac{-434.7J}{0.008mole}=-54337 J/mol=-54.3 kJ/mol$

7 0

3 years ago

Which of the following limits a population's growth?

Svetllana [295]

Answer: Limitations to population growth are either density-dependant or density-independent. Density-dependent factors include disease, competition, and predation. Density-dependant factors can have either a positive or a negative correlation to population size.

Explanation:

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3 years ago