Question

Expy 14 identification of specific anions

REPORT FOR EXPERIMENT 13 (eontinued) NAME 2. Measurement of Acidity and pH (a) What is the effect of acids on the color of red litmus? aghe nat (b) What is the effect of acids on the color of blue litmus? (c) What color is phenolphthalein in an acid solution? (d) What was the pH of the hydrochloric acids tested? 0.001 M 0.01 M 0.1 M (e) Which pH measured has the highest number of H in solution? (f What is the H concentration in an acid with of pH 4.6? Express your answer as a power of. 10 Refer to Study Aid 4 if you need help with using your caleulator to convert the pH into H concentration using the antilog function. 3. Reaction with Carbonates and Bicarbonates (a) What gas is formed in these reactions? Name Formula (b) What happened to the burning splint when it was thrust into the beaker? (c) What do you conclude about one of the properties of the gas in the beaker, based on the behavior of the burning splint? (d) Complete and balance the equations representing the reactions: NaHCO (s) + HCI(aq) CaCOf(s)+ HClaq) 119

Answer 1

2) a) effect of acid on the color of red A litmus No effect. b effect of acid on the color of blue. A litmus Blue paber changes to red. c) What color is phenolph thalein in an acid solution de colorless acid d) pH of the hydrochloric 100 lm 4-109 6.001) = 3 01m : - Log() 2 1my -log(.1)= 1 e) which pH measured has the highest number of tt in solution? O $) $H = 4.6 3-10g Cu+] = .6 [H+] = 40-44 (Au) 3 a Name: Carbon dioxide formula CO b) If the gas is flammable the mixture ignites (commonly use to identify Hydrogen) . If the gas is non-flammasie burning splint will be extinguished (eg. c) If the splint extinguished non-flamable N2, CO2)

. If the splint ignites e flammable d. Nait CO₂ + Het Nace + co₂ +H2O Ca Co, + 2H4 co c, + CD, +н,о