Mailings Review View Help Tell me what you want to do AEEmphasis Heading 1 1 Nor

Question

Mailings Review View Help Tell me what you want to do AEEmphasis Heading 1 1 Normal Strong Subtitle Tdle Paragraph Styles In the Acid base titration expenment, when 1UmL of HCJ was added to the flask which already had 2 mL of water in it. It was not realized and titration was carried out. How this error has eftected the final HCL concentration calculation? a. Concentration of HCl will be more than it is supposed to be b Concentration of HCI will be less than it is supposed to be c. It has no impact on the concentration of HCI d. Non of the above 2. The product of the following word equation would be Copper (II) nitrate + sodium hydroxide a. Copper sodium+ Nitrate (II) hydroxide b Copper (I) hydroxide + sodium nitrate C. Copper hydroxide + sodium nitrate d. Sodium+Copper (II) hydroxide 3. What is the missing product of the reaction given as NaHCO3 + HCl Naa + H2O +. b CO2 03 4 Which of the following contains the smallest number of moles? a 10 g U 1.0 g P 1.0 g Al 1.0 g Br 10 a Na e. e@1

Explanation / Answer

Q1

if we use V = 10 mL in our calculations ,there is no effect

if we use V = 10+2 =12 mL in our calcualtions, the concentration will be lower, since V dilutes the acid

Q2

Cu(NO3)2 + 2NaOH = NaNO3(aq) + Cu(OH)2(s)

therefore,

solid copper hydroxide precipitates as well as sodium nitrate

choose C

Q4

smaller moles --> the higher the mole mass

then

from the list, U has the largest mass

so there are the smallest amount of moles in U

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