Waching daily Feb 3 2017

Properties of Acetic Acid Odour

Take a small quantity of acetic acid in a test tube and smell it.

It emits an irritating pungent odour.

Solubility in water Take small quantity of acetic acid in one

test tube and a small quantity of distilled water in another test tube.

Add acetic acid to the water.

Shake the test tube well.

A homogeneous solution is formed.

Effect on litmus Take a strip of blue litmus paper.

Dip it in a test tube containing a small quantity of acetic acid.

Blue litmus turns red.

Reaction with sodium bicarbonate Take a small quantity of sodium bicarbonate

in a boiling tube.

Clamp the boiling tube to a stand.

Close the mouth of the boiling tube with a double bored cork.

Insert a thistle funnel into the tube through one of the hole in the cork.

Take another boiling tube containing lime water.

Clamp this boiling tube to another stand.

Take a delivery tube and insert one end in the tube containing sodium bicarbonate (through

the hole in the cork) and the other end in the tube containing lime water.

Take a bottle containing acetic acid.

Pour the acetic acid through the thistle funnel into the boiling tube containing sodium bicarbonate.

A gas evolves.

The lime water in the boiling tube turns milky.

The gas evolved is CO2 which turns lime water milky.

For more infomation >> Properties of Acetic Acid - OLabs - Duration: 2:16.

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Cleaning Capacity of Soap - OLabs - Duration: 5:29.

Cleaning Capacity of Soap We require beakers, soap pieces, cloth pieces,

distilled water, well water, 50 ml measuring cylinders, 10 ml measuring cylinders, measuring

scale, test tubes, ink, glass rods, calcium chloride, and a Bunsen burner.

Take the beaker containing distilled water.

Measure 20 ml of distilled water in a measuring cylinder.

Pour it into beaker A. Take the beaker containing well water.

Measure 20 ml of well water in another measuring cylinder.

Pour it into beaker B. Again, take 20 ml of distilled water in the

measuring cylinder.

Pour it into beaker C. Take 2 g calcium chloride.

Transfer it into beaker C containing distilled water.

Stir the contents with a glass rod till calcium chloride dissolves.

Take three soap pieces each weighing 1 g and add one soap piece each into the beakers A,

B and C. Take three glass rods and place one in each

beaker.

Stir the contents with the glass rods to ensure that soap has dissolved.

In case the soap does not dissolve completely, take the beaker and place it on a Bunsen burner.

Heat the beaker gently while stirring using a glass rod.

Repeat the same steps for the other two beakers.

Take three test tubes labeled as A, B and C.

Take beaker A containing soap solution and pour 10 ml soap solution in a measuring jar.

Transfer it into test tube A. Similarly, pour 10 ml of soap solution from

beaker B into test tube B, and from beaker C into test tube C using different measuring

cylinders.

Measure the initial length of soap solution in each test tube with a measuring scale.

Note the readings.

Take test tube A. Hold the test tube by hand and close its mouth

with the thumb.

Shake it up and down thoroughly 10 times.

You will notice that lather has formed in the test tube.

Repeat the same steps for the other two test tubes.

Measure the length of the lather and the final length of the soap solution in each test tube.

Soap solution in test tube A produces the maximum length of lather, the solution in

test tube B produces a smaller length of lather and the solution in test tube C produces the

minimum length of lather.

Take a tile and place three white cloth pieces on it.

Put a drop of ink in the centre of each cloth and allow it to dry.

Take the cloth pieces from the tile.

Place one piece of cloth with ink spot in the remaining soap solution in beaker A, another

piece of cloth in beaker B and the third piece of cloth in beaker C.

Leave the three beakers undisturbed for about 10 min.

Remove the pieces of cloth from the beakers and rub each piece.

The ink spot on the cloth in soap solution A has almost disappeared.

The ink spot on the cloth in soap solution B has partially disappeared.

There is no change in the colour of the ink spot on the piece of cloth dipped in soap

solution C, and some scum has been deposited on the surface of the cloth piece.

It is observed that soap solution with distilled water (soft water) has the most cleansing

capability.

Soap solution with well water (hard water) has less cleansing capability than soft water.

Soap solution with distilled water with calcium chloride dissolved in it (very hard water)

has the least cleansing capability.

For more infomation >> Cleaning Capacity of Soap - OLabs - Duration: 5:29.

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Seen At 11: 'Breadcrumbing' Is Latest Dating Don't - Duration: 1:35.

CBS2'S VALERIE CASTRO HAS MORE

ON THE DATING DRAMA.

Reporter: IN A CITY FULL OF

SINGLES, DATING CAN BE FULL OF

GAMES.

BREADCRUMB IN IS THE NAME OF

THE NEWEST GAME. IT IS LIKE A

TEASE.

THERE IS NO FOLLOW-THROUGH.

THERE IS NO PLAN.

DATING EXPERTS SAY IT CAN BE

AGGRAVATING AND LEAVE YOU

FEELING LOST AND STUCK ON THE

ICE.

IT LEAVES A PERSON HANGING

AND HOPING AND GOING THROUGH

THAT EMOTIONAL ROLLER

COASTER. Reporter: URBAN

DICTIONARY SAYS IT IS ALSO

KNOWN AS HENSEL AND GRETEL AND

DEFINES IT AS WHEN A GUY OR

GIRL GIVES SOMEONE JUST ENOUGH

ATTENTION TO KEEP THEIR HOPES

OF A RELATIONSHIP ALIVE.

IT IS A PUNK MOVE.

LET ME GO AND MOVE ON WITH MY

LIFE.

IT SEEMS LIKE A WASTE OF

TIME. IT IS DISHONEST.

Reporter: IT TENDS TO BE A

MOVE THAT FEEDS EGOS.

IT IS 100% AN EGO THING.

Reporter: HOW DO YOU DEAL WITH

THE KIND OF PERSON WHO WILL

ONLY TOSS OUT THAT OCCASIONAL

BREADCRUMB?

THE EASIEST THING TO DO IS

DON'T ENGAGE. JUST CUT IT

OFF.

TELL THE PERSON YOU'RE NOT

INTERESTED.

I WOULD NEVER TALK TO THAT

TYPE OF PERSON AGAIN.

Reporter: RATHER OPEN AND

HONEST COMMUNICATION IS THE

BEST WAY TO GROW A BUDDING

ROMANCE.

IN MANHATTAN, VALERIE CASTRO,

CBS2 NEWS.

THAT IS WHY WE HAVE THE MUTE

BUTTON.

For more infomation >> Seen At 11: 'Breadcrumbing' Is Latest Dating Don't - Duration: 1:35.

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Janet Jackson's newborn son Eissa is paid a visit by her famous family - Duration: 2:12.

For more infomation >> Janet Jackson's newborn son Eissa is paid a visit by her famous family - Duration: 2:12.

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Sign Of The Times Is All About Love - Duration: 1:37.

CHAIN BECAUSE OF THIS.

LIVE TONIGHT IN DALLAS J.D.

MILES, CBS11 NEWS.

IT STARTED DAYS AFTER THE

DALLAS POLICE AMBUSH AND ONE

MAN FROM NORTH TEXAS IS

CONTINUING WITH HIS MISSION TO

SPREAD A MESSAGE OF LOVE.

JEFF PAUL WITH THE SIMPLE

PHRASE THAT HONESTLY SOME FEEL

WE ALL NEED NOW MORE THAN EVER.

Reporter: A SIGN AND A

STANCE.

THAT'S HOW CHRIS BAILEY THINKS

HE'S GOING TO CHANGE THE WORLD.

THE BIGGER CRISIS WE SEEM TO

BE IN, THE MORE WELL RECEIVED I

AM.

Reporter: WE FIRST TOLD YOU

ABOUT CHRIS AFTER THE JULY

AMBUSH.

HIS MOVEMENT SPREAD ACROSS THE

GLOBE.

I SAID LAST TIME I MET YOU

WE NEED A LIGHT AT THE END OF

THE TUNNEL.

I HAVEN'T SEEN IT YET.

I THINK THERE MAY BE MORE HATE

NOW THAN THERE WAS THEN.

Reporter: IF IT'S ONLY

GOTTEN WORSE, WHAT'S THE POINT?

THERE'S ALWAYS GOING TO BE

PEOPLE OUT THERE THAT JUST

WON'T FALL IN PLACE AND DO

THIS, BUT I GUESS I'M KIND OF A

DREAMER, MAN.

Reporter: BUT THEN THERE

ARE MOMENTS LIKE THIS.

WE LIKE WHAT YOU.

DO.

Reporter: REMINDING -- WHAT

YOU DO.

Reporter: REMINDING CHRIS

IT'S NOT A DREAM.

ANDREW CLUGSTON PULLED OVER

HOPING TO SET AN EXAMPLE FOR

HIS 4-YEAR-OLD DAUGHTER, MAYA.

THE MESSAGE NEEDS TO BE OUT

THERE.

THAT'S WHY I KEEP DOING IT.

IT MADE A DIFFERENCE FOR

SOMEBODY OUT THERE THAT DAY.

Reporter: AS MUCH AS HE

BELIEVES FOR HIS SIGN AND ITS

MESSAGE, CHRIS IS REALISTIC.

WE GOT TO TRY.

UNTIL THEN HERE I AM.

Reporter: CHRIS BAIL HILL

HAS A FACEBOOK PAGE -- BAILEY

HAS A FACEBOOK PAGE.

THERE'S A LINK ON OUR WEBSITE