Recent content by Jack16

I seem to need a little Help here:(... I am not sure if i am answering this question correctly so i thought i'd ask it here... Suppose a thin peace of glass were placed in front of on of the two slits so that two waves enter the slits 18o degrees out of phase.Describe in detail the...

I Need Some Help:(... In a water tank experiment,water waves are generated with their srests 2.5 cmapart and parallel.they pass through two openings 5.0 cm apart in a long wooden board.If the end of the tank is 2.0 m beyond the boards,where would you stand ,relative to the "straight - through "...

This Is A Challenging One... A proton and an electron have the same kinetic energyuopn entering a region of constant magnetic field What is the ratio of the radii of their circular paths? I used MeVe squared= MpVp squared but i couldn't get the ratios from these...

Changes Of pH values... Could You Guys Help Me Out With THis Question Please, Why would the pH of a solution not change by much when a little amount of acid or alkali are added to the solution??

Hi People ,Could You Please help me with this question... There's a satellite called Meteostat which in the geostationary orbit.Could you explain me why its periodic time is not exactly equal to 24 when it is viewed by an observer positioned at a point on the equator...

The Last Question... c)Picric acid has an ionisation constant of 5.0x10^-3 moldm^-3.It can act as an acid base indicator,the anions being red,and the free acid yellow.What colour will it show in a solution of pH5?

Could You Help Me Out With This Question Please: 25.0 cm3 of a solution of 0.1M ethanoic acid is titrated with 0.1M sodium hydroxide.When sufficient alkali has been added to neutralise half of the acid,calculate a)the concentration of ethanoic acid and ethanoate ions b)the pH of the...

Hi People , I had a problem solving this question,could you please help me:D The question: a)The ionisation constant for propanoic acid is 1.26x10^-5 mol dm^-3.Calculate pH of a 1.0M solution b)What is the hydroxide ion concentration of this solution? c)Pocroc acid has an ionisation...

Could You Help Me Out Please... The Value of Kw ,the ionic product of water,increases with temperature.Will the pH of pure water be greater or less than 7 at 100*C?

Hello People, I wasn't quiet sure bout this question so i thought i'd ask it here aswell! The question: The ionisation constant of water has the values 1x10^-14 mol2dm-6 at 25 C and 1.7x10^-14 mol2dm-6 at 75 C,which of the following statements are correct: a)the pH of water at 25 C...

Hi People I had problems solvin this question could you please help me, The question: On 19th June 1981,an experimental meteorological satellite of mass m=700 kg,was placed in a geostationary orbit usingthe launch vehicle Ariane. Calculate: a) the radius of geostationary orbit...

Thanks altered gravity your answer really helped ,although I am turkish too chem_tr:) your answer caused me some confusion but after i read it more carefully i could understand it .Thanks Guys !

Hello People, I am a new member and i really think this forum is very helpful... I got a question... The pH values of 0.100moldm-3 solutions of hydrocloric acid and ethanoic acid are 1 and aproximately 3 respectively. Explain the difference. Thanks already...