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Well now we talk about
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colligative properties What are colligative properties well
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colligative properties
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are physical properties of a
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solution where the physical properties are
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not influenced by the type of solute,
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yes, it is not influenced by the type of
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solute, but these properties are only
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influenced by the number of
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solute particles, yes So what does that mean, for example,
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if there are 100 GR of water, yes
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There are two containers containing 100 GR of water,
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is added to each container,
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0.1 mol of HCl and 0.1 mol of
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NaOH Well now like this Eh if anyone
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dares to taste, yes, who feels
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So if we taste it, yes, it
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turns out that between HCL and noh, the taste is
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different, yes, so the taste is not a
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colligative property because the taste is different
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So if the solute is HCL and nooh, the
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solute is different, yes, it turns out that
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the taste is different, so the taste is not a
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colligative property then if we measure
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the pH, yes PH, yes, this will
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produce what, this will produce an
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HCl solution, this will produce a
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solution HCl and this will produce
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what NaOH solution, right?
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NaOH solution, we know that HCL
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is acidic, right? That means
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its pH is below 7, while if the solution is
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wet, then the pH is above 7, then HCL
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and NaOH, yes, the solute is different,
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then the pH is different, then the pH is also not a
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colligative property, so
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this is not a colligative property,
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now what is the same EE between HCL
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and NaOH, see, this 0.1 mol HCL is also
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0.1 mol Git, yes, then the possibility of the number of
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particles of the substance is the same, yes, so when the number of
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particles of the substance is the same, what are the properties?
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Okay, if we measure the boiling point, yes, the boiling point, the
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boiling point of HCL, it
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turns out that the Didi point is
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100.104 degrees Celsius, this is the Didi point of
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this HCL, yes, 0.1 mol is put
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into 100 grams of water, the didi is 100
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Oh sorry, not 100.104 but
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101.04 degrees Celsius, then the
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NAOH turns out to be the same
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101.04 degrees Celsius, then if
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we measure the other, for example, the freezing point, the
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freezing point of the
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HCL, the freezing point of the HCL, if
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measured, turns out to be
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3.72 degrees Celsius and the
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freezing point of NAOH, yes, this NaOH
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turns out to be the same
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-3.72 degrees Celsius, so with the
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same number of particles of the substance, even though the
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type of substance is different, HCL and NOOH
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turn out to give the same boiling point and
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freezing point, then the boiling point
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and freezing point are related to
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colligative properties, yes, they are related
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to colligative properties because they give the
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same value or the same properties.
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Okay, but the colligative properties are not the
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Didi point and the freezing point, yes, the
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colligative properties are One of the
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colligative properties related to the
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boiling point is the increase in
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boiling point So it's not the boiling point, yes, but the
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increase in boiling point Well, why is the
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increase Because like this, if the increase
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means ee, well, it increases against what,
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okay, if we know the water, what is the
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id of 100 degrees Celsius, right?
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If the HCL solution that was
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101.04 Celsius then if the HCl solution
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how much Eh is the same yes
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100 1.04 degrees Celsius Well so
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the increase in the HCl solution eh to water is the
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same as eh sorry earlier NaOH yes
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so the increase in the boiling point of HCL to
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water is the same as the increase in the boiling point of
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NaOH to water so yes so the difference in
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HCL gi point of HCl with water with the difference in the
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gi point of NaOH with water is the same yes the coaligative property is the
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boiling point yes Then the second freezing point well what is
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freezing point is the coaligative property is the depression in the
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freezing point yes Pan point book Why the decrease
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because we know that water is 0
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degrees Celsius earlier HCl solution how much
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-3.72 degrees Celsius e NaOH solution
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-3.72 degrees Celsius means the difference in the
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freezing point of the resulting solution with water and the
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difference in the freezing point of lutan noh with water is the
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same yes this is eh one of
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ee eh not one of yes These are two of
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several negative k properties yes so
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other colligative properties The
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vapor pressure well the third is the decrease in
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vapor pressure well the fourth is pressure
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osmotic so these four colligative properties
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are only influenced by the
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number of solute particles and are not
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EE type of solute well then
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another thing that must be paid attention to
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is ee the colligative properties will
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ee appear or will be observed if the
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solution has a solvent
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lute substance Well what needs to be
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paid attention to is the solute
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is the substances that are usually or must be
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difficult to evaporate
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so the soluble substance must be difficult to evaporate
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meaning later the colligative properties can be
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observed but if the lute substance is easily
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evaporated then this colligative property is ee
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difficult to observe so for example
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if the boiling point is like that So if the
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boiling point is heated continuously the substance also
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evaporates then eh the
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colligative properties become unobservable gu
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yes So what needs to be paid attention to is the
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sea substances are substances
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that are EE difficult to evaporate then the colligative properties
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can be observed yes Well that's ee a brief
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introduction to colligative properties
