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com www.GOALias.blogspot.com www.GOALias ... - fun learning

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<strong>www</strong>.<strong>GOALias</strong>.<strong>blogspot</strong>.<strong>com</strong>Table 5.4S. No. Test solution Initial colour1. Shampoo (dilute solution)2. Lemon juice3. Soda water4. Sodium hydrogencarbonate solution5. Vinegar6. Sugar solution7. Common salt solutionFinal colourwarm water. Keep the mixture for sometime till water be<strong>com</strong>es coloured. Usethe coloured water as an indicator. Addfive drops of the indicator to each of thesolutions given in Table 5.4.What is the effect of the indicator onacidic, basic and neutral solutions?China rose indicator (Fig. 5.3) turnsacidic solutions to dark pink (magenta)and basic solutions to green.I am not getting the same resultwhen using solid baking sodaon dry litmus paper. Why?Make a solution of bakingsoda and then try.Paheli brought the following paheli(riddle) for you.Coffee is brownAnd bitter in taste.Is it an acid?Or a base?Don’t give the answerWithout any test,You are in the darkWith its taste.Activity 5.4The teacher is requested to get thefollowing dilute chemicals from his/herschool laboratory or from a nearbyschool: hydrochloric acid, sulphuricacid, nitric acid, acetic acid, sodiumhydroxide, ammonium hydroxide,calcium hydroxide (lime water).Table 5.5S. Name of acidNo.Effect onlitmus paperEffect onturmeric paperEffect onChina rosesolution1. Dilute hydrochloric acid2.3., BACIDSCIDS, , BASESAND SALTS5353

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