Na2CO3+ 2HCl === 2NaCl + CO2 + H2O
106 7344
xy0.44g
106/44=x/0.44g73/44=y/0.44g
x=1.06gy=0.73g
所取样品中含有1.06克碳酸钠杂质.
样品中氢氧化钠的质量分数:(10g-1.06g)/10g*100% = 89.4%;
稀盐酸中溶质的质量分数: 0.73g/100g*100% = 0.73%
Na2CO3+ 2HCl === 2NaCl + CO2 + H2O
106 7344
xy0.44g
106/44=x/0.44g73/44=y/0.44g
x=1.06gy=0.73g
所取样品中含有1.06克碳酸钠杂质.
样品中氢氧化钠的质量分数:(10g-1.06g)/10g*100% = 89.4%;
稀盐酸中溶质的质量分数: 0.73g/100g*100% = 0.73%