ã1ãæç
§ æ¶æ¯æ¶²çå¯åº¦= 1 ï¼500mg/L = 0.5g/1000g = 0.05/100 = 0.05%
ã2ãç¨éåæ° B = 5%/0.05% = 100ï¼ åï¼ï¼å³ 1:100 çæ¯ä¾é
å¶
ã3ãé
å¶ï¼1000 ml 500mg/Lçæ¶æ¯åï¼å¯åå
¶5ml 5% çæ¶æ¯åï¼å 495mlæ°´ï¼æ··åå³å¯ã
温馨提示:答案为网友推荐,仅供参考