Which set of balancing coefficients (in respective order) can be used to balance the following reaction:
-- K (s) + __ H2SO3 (aq) --
-->
_K2SO3 (aq) + __H2
-
a) 1,2,2,1
b) 2.1.2.1
c) 1,2,1,2
d) 2,1,1,1

  the moles   of   sulfuric acid   that are needed to react   completely with 6.4   moles   of lithium hydroxide   is 12.8   moles ( answer a)

calculation

step 1 : write a balanced   chemical equation

2lioh   + h₂so₄   →   li₂so₄   +2h₂o

step 2 : use the mole ratio   to determine   the   moles h₂so₄

from   equation above   lioh: h₂so₄   is 2: 1 therefore   the moles of h₂so₄

= 6.4   x 2/1   = 12.8   moles   of h₂so₄